diff --git a/extensions/authentication-jwt/.npmrc b/extensions/authentication-jwt/.npmrc
new file mode 100644
index 000000000000..cafe685a112d
--- /dev/null
+++ b/extensions/authentication-jwt/.npmrc
@@ -0,0 +1 @@
+package-lock=true
diff --git a/extensions/authentication-jwt/LICENSE b/extensions/authentication-jwt/LICENSE
new file mode 100644
index 000000000000..044814380839
--- /dev/null
+++ b/extensions/authentication-jwt/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) IBM Corp. 2019. All Rights Reserved.
+Node module: @loopback/extension-health
+This project is licensed under the MIT License, full text below.
+
+--------
+
+MIT license
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/extensions/authentication-jwt/README.md b/extensions/authentication-jwt/README.md
new file mode 100644
index 000000000000..de5611e047a0
--- /dev/null
+++ b/extensions/authentication-jwt/README.md
@@ -0,0 +1,59 @@
+# @loopback/extension-authentication-jwt
+
+This module exports the jwt authentication strategy and its corresponding token
+service as a component. You can mount the component to get a prototype token
+based authentication system in your LoopBack 4 application.
+
+## Usage
+
+This module contains an example LoopBack 4 application in folder `fixtures`. It
+contains:
+
+- a `User` and a `UserCredentials` model.
+- a user service that contains user utility functions like validating
+  credentials.
+  - tip: the user service is not extracted into the jwt component because it
+    couples with model `User` and `UserCredentials`.
+- a controller with endpoints `/login` and `/whoAmI`.
+
+To mount the jwt component in the example, you can add this code in file
+`application.ts`:
+
+```ts
+// Assume you already enabled the authentication system
+// in the sequence and application file.
+this.component(JWTAuthenticationComponent);
+
+// You will find the current example has an extra function to
+// merge the security spec into the application.
+// This will be improved with a coming enhancer.
+// See section [To Be Done](#to-be-done)
+```
+
+_All the jwt authentication related code are marked with comment "- enable jwt
+auth -", you can search for it to find all the related code you need to enable
+the entire jwt authentication in a LoopBack 4 application._
+
+## To Be Done
+
+The security specification is currently manually added in the application file.
+The next step is to create an enhancer in the component to automatically bind
+the spec when app starts.
+
+## Contributions
+
+- [Guidelines](https://github.com/strongloop/loopback-next/blob/master/docs/CONTRIBUTING.md)
+- [Join the team](https://github.com/strongloop/loopback-next/issues/110)
+
+## Tests
+
+Run `npm test` from the root folder.
+
+## Contributors
+
+See
+[all contributors](https://github.com/strongloop/loopback-next/graphs/contributors).
+
+## License
+
+MIT
diff --git a/extensions/authentication-jwt/index.d.ts b/extensions/authentication-jwt/index.d.ts
new file mode 100644
index 000000000000..32733e892d9b
--- /dev/null
+++ b/extensions/authentication-jwt/index.d.ts
@@ -0,0 +1,6 @@
+// Copyright IBM Corp. 2019. All Rights Reserved.
+// Node module: @loopback/extension-health
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+export * from './dist';
diff --git a/extensions/authentication-jwt/index.js b/extensions/authentication-jwt/index.js
new file mode 100644
index 000000000000..edfea480527e
--- /dev/null
+++ b/extensions/authentication-jwt/index.js
@@ -0,0 +1,6 @@
+// Copyright IBM Corp. 2019. All Rights Reserved.
+// Node module: @loopback/extension-health
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+module.exports = require('./dist');
diff --git a/extensions/authentication-jwt/index.ts b/extensions/authentication-jwt/index.ts
new file mode 100644
index 000000000000..217ffb985feb
--- /dev/null
+++ b/extensions/authentication-jwt/index.ts
@@ -0,0 +1,8 @@
+// Copyright IBM Corp. 2019. All Rights Reserved.
+// Node module: @loopback/extension-health
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+// DO NOT EDIT THIS FILE
+// Add any additional (re)exports to src/index.ts instead.
+export * from './src';
diff --git a/extensions/authentication-jwt/package-lock.json b/extensions/authentication-jwt/package-lock.json
new file mode 100644
index 000000000000..23c7c76c6e83
--- /dev/null
+++ b/extensions/authentication-jwt/package-lock.json
@@ -0,0 +1,1351 @@
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diff --git a/extensions/authentication-jwt/package.json b/extensions/authentication-jwt/package.json
new file mode 100644
index 000000000000..1b5b16d26e5c
--- /dev/null
+++ b/extensions/authentication-jwt/package.json
@@ -0,0 +1,68 @@
+{
+  "name": "@loopback/extension-authentication-jwt",
+  "version": "0.0.0",
+  "description": "Extension for the prototype of JWT authentication",
+  "engines": {
+    "node": ">=10"
+  },
+  "scripts": {
+    "build": "lb-tsc",
+    "clean": "lb-clean loopback-extension-authentication-jwt*.tgz dist tsconfig.build.tsbuildinfo package",
+    "pretest": "npm run build",
+    "test": "lb-mocha \"dist/__tests__/unit/*.js\" \"dist/__tests__/acceptance/*.js\"",
+    "verify": "npm pack && tar xf loopback-extension-authentication-jwt*.tgz && tree package && npm run clean"
+  },
+  "author": "IBM Corp.",
+  "copyright.owner": "IBM Corp.",
+  "license": "MIT",
+  "dependencies": {
+    "@loopback/authentication": "^4.1.1",
+    "@loopback/core": "^2.2.0",
+    "@loopback/openapi-v3": "^3.1.1",
+    "@loopback/rest": "^3.1.0",
+    "@loopback/rest-explorer": "^2.0.2",
+    "@loopback/security": "^0.2.2",
+    "@loopback/service-proxy": "^2.0.2",
+    "@types/bcryptjs": "2.4.2",
+    "bcryptjs": "^2.4.3",
+    "jsonwebtoken": "^8.5.1"
+  },
+  "devDependencies": {
+    "@loopback/build": "^5.0.0",
+    "@loopback/boot": "^2.0.2",
+    "@loopback/repository": "^2.0.2",
+    "@loopback/eslint-config": "^6.0.2",
+    "@loopback/testlab": "^2.0.2",
+    "@types/lodash": "^4.14.149",
+    "@types/node": "^10.17.18",
+    "@typescript-eslint/eslint-plugin": "^2.26.0",
+    "@typescript-eslint/parser": "^2.26.0",
+    "eslint": "^6.8.0",
+    "eslint-config-prettier": "^6.10.1",
+    "eslint-plugin-eslint-plugin": "^2.2.1",
+    "eslint-plugin-mocha": "^6.2.2",
+    "lodash": "^4.17.15",
+    "typescript": "~3.8.3"
+  },
+  "keywords": [
+    "LoopBack",
+    "Authentication",
+    "jsonwebtoken"
+  ],
+  "files": [
+    "README.md",
+    "index.js",
+    "index.d.ts",
+    "dist",
+    "src",
+    "!*/__tests__"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/strongloop/loopback-next.git",
+    "directory": "extensions/health"
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/acceptance/jwt.component.test.ts b/extensions/authentication-jwt/src/__tests__/acceptance/jwt.component.test.ts
new file mode 100644
index 000000000000..dfc51cc612a7
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/acceptance/jwt.component.test.ts
@@ -0,0 +1,100 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {
+  Client,
+  createRestAppClient,
+  expect,
+  givenHttpServerConfig,
+} from '@loopback/testlab';
+import {genSalt, hash} from 'bcryptjs';
+import * as _ from 'lodash';
+import {TestApplication} from '../fixtures/application';
+import {UserRepository} from '../fixtures/repositories';
+
+describe('jwt authentication', () => {
+  let app: TestApplication;
+  let client: Client;
+  let token: string;
+  let userRepo: UserRepository;
+
+  before(givenRunningApplication);
+  before(() => {
+    client = createRestAppClient(app);
+  });
+  after(async () => {
+    await app.stop();
+  });
+
+  it(`user login successfully`, async () => {
+    const credentials = {email: 'jane@doe.com', password: 'opensesame'};
+    const res = await client.post('/users/login').send(credentials).expect(200);
+    token = res.body.token;
+  });
+
+  it('whoAmI returns the login user id', async () => {
+    const res = await client
+      .get('/whoAmI')
+      .set('Authorization', 'Bearer ' + token)
+      .expect(200);
+    expect(res.text).to.equal('2');
+  });
+
+  /*
+   ============================================================================
+   TEST HELPERS
+   ============================================================================
+   */
+
+  async function givenRunningApplication() {
+    app = new TestApplication({
+      rest: givenHttpServerConfig(),
+    });
+
+    await app.boot();
+    userRepo = await app.get('repositories.UserRepository');
+    await createUsers();
+    await app.start();
+  }
+
+  async function createUsers(): Promise<void> {
+    const hashedPassword = await hashPassword('opensesame', 10);
+    const users = [
+      {
+        id: 1,
+        username: 'John',
+        email: 'john@doe.com',
+        password: hashedPassword,
+      },
+      {
+        id: 2,
+        username: 'Jane',
+        email: 'jane@doe.com',
+        password: hashedPassword,
+      },
+      {
+        id: 3,
+        username: 'Bob',
+        email: 'bob@projects.com',
+        password: hashedPassword,
+      },
+    ];
+
+    for (const u of users) {
+      await userRepo.create(_.pick(u, ['id', 'email', 'username']));
+      await userRepo
+        .userCredentials(u.id)
+        .create({password: u.password, userId: u.id});
+    }
+  }
+
+  async function hashPassword(
+    password: string,
+    rounds: number,
+  ): Promise<string> {
+    const salt = await genSalt(rounds);
+    return hash(password, salt);
+  }
+});
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/application.ts b/extensions/authentication-jwt/src/__tests__/fixtures/application.ts
new file mode 100644
index 000000000000..f8355da18416
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/application.ts
@@ -0,0 +1,78 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {AuthenticationComponent} from '@loopback/authentication';
+import {BootMixin} from '@loopback/boot';
+import {ApplicationConfig} from '@loopback/core';
+import {RepositoryMixin} from '@loopback/repository';
+import {RestApplication} from '@loopback/rest';
+import {RestExplorerComponent} from '@loopback/rest-explorer';
+import {ServiceMixin} from '@loopback/service-proxy';
+import path from 'path';
+import {JWTAuthenticationComponent, SECURITY_SCHEME_SPEC} from '../../';
+import {UserServiceBindings} from './keys';
+import {MySequence} from './sequence';
+import {MyUserService} from './user.service';
+
+export class TestApplication extends BootMixin(
+  ServiceMixin(RepositoryMixin(RestApplication)),
+) {
+  constructor(options: ApplicationConfig = {}) {
+    super(options);
+
+    // Set up the custom sequence
+    this.sequence(MySequence);
+
+    // Set up default home page
+    this.static('/', path.join(__dirname, '../public'));
+
+    // - enable jwt auth -
+    // Add security spec (To be done: refactor it to an enhancer)
+    this.addSecuritySpec();
+    // Mount authentication system
+    this.component(AuthenticationComponent);
+    // Mount jwt component
+    this.component(JWTAuthenticationComponent);
+
+    // Bind user service
+    this.bind(UserServiceBindings.USER_SERVICE).toClass(MyUserService);
+
+    this.component(RestExplorerComponent);
+    this.projectRoot = __dirname;
+    // Customize @loopback/boot Booter Conventions here
+    this.bootOptions = {
+      controllers: {
+        dirs: ['controllers'],
+        extensions: ['.controller.js'],
+        nested: true,
+      },
+      repositories: {
+        dirs: ['repositories'],
+        extensions: ['.repository.js'],
+        nested: true,
+      },
+    };
+  }
+
+  // - enable jwt auth -
+  addSecuritySpec(): void {
+    this.api({
+      openapi: '3.0.0',
+      info: {
+        title: 'test application',
+        version: '1.0.0',
+      },
+      paths: {},
+      components: {securitySchemes: SECURITY_SCHEME_SPEC},
+      security: [
+        {
+          // secure all endpoints with 'jwt'
+          jwt: [],
+        },
+      ],
+      servers: [{url: '/'}],
+    });
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/controllers/user.controller.ts b/extensions/authentication-jwt/src/__tests__/fixtures/controllers/user.controller.ts
new file mode 100644
index 000000000000..9d96631d4e57
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/controllers/user.controller.ts
@@ -0,0 +1,102 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+// Uncomment these imports to begin using these cool features!
+
+import {
+  authenticate,
+  TokenService,
+  UserService,
+} from '@loopback/authentication';
+import {inject} from '@loopback/core';
+import {get, post, requestBody} from '@loopback/rest';
+import {SecurityBindings, securityId, UserProfile} from '@loopback/security';
+import {TokenServiceBindings} from '../../../';
+import {UserServiceBindings} from '../keys';
+import {User} from '../models';
+import {Credentials} from '../user.service';
+
+const CredentialsSchema = {
+  type: 'object',
+  required: ['email', 'password'],
+  properties: {
+    email: {
+      type: 'string',
+      format: 'email',
+    },
+    password: {
+      type: 'string',
+      minLength: 8,
+    },
+  },
+};
+
+export const CredentialsRequestBody = {
+  description: 'The input of login function',
+  required: true,
+  content: {
+    'application/json': {schema: CredentialsSchema},
+  },
+};
+
+export class UserController {
+  constructor(
+    @inject(TokenServiceBindings.TOKEN_SERVICE)
+    public jwtService: TokenService,
+    @inject(UserServiceBindings.USER_SERVICE)
+    public userService: UserService<User, Credentials>,
+    @inject(SecurityBindings.USER, {optional: true})
+    private user: UserProfile,
+  ) {}
+
+  @post('/users/login', {
+    responses: {
+      '200': {
+        description: 'Token',
+        content: {
+          'application/json': {
+            schema: {
+              type: 'object',
+              properties: {
+                token: {
+                  type: 'string',
+                },
+              },
+            },
+          },
+        },
+      },
+    },
+  })
+  async login(
+    @requestBody(CredentialsRequestBody) credentials: Credentials,
+  ): Promise<{token: string}> {
+    // ensure the user exists, and the password is correct
+    const user = await this.userService.verifyCredentials(credentials);
+
+    // convert a User object into a UserProfile object (reduced set of properties)
+    const userProfile = this.userService.convertToUserProfile(user);
+
+    // create a JSON Web Token based on the user profile
+    const token = await this.jwtService.generateToken(userProfile);
+
+    return {token};
+  }
+
+  @authenticate('jwt')
+  @get('/whoAmI', {
+    responses: {
+      '200': {
+        description: '',
+        schema: {
+          type: 'string',
+        },
+      },
+    },
+  })
+  async whoAmI(): Promise<string> {
+    return this.user[securityId];
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.config.json b/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.config.json
new file mode 100644
index 000000000000..43202b0a3aa8
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.config.json
@@ -0,0 +1,4 @@
+{
+  "name": "db",
+  "connector": "memory"
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.ts b/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.ts
new file mode 100644
index 000000000000..99ed459a8402
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/datasources/db.datasource.ts
@@ -0,0 +1,19 @@
+// Copyright IBM Corp. 2018,2019. All Rights Reserved.
+// Node module: @loopback/example-todo
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {inject} from '@loopback/core';
+import {juggler} from '@loopback/repository';
+import config from './db.datasource.config.json';
+
+export class DbDataSource extends juggler.DataSource {
+  static dataSourceName = 'db';
+
+  constructor(
+    @inject('datasources.config.db', {optional: true})
+    dsConfig: object = config,
+  ) {
+    super(dsConfig);
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/keys.ts b/extensions/authentication-jwt/src/__tests__/fixtures/keys.ts
new file mode 100644
index 000000000000..970649a83efe
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/keys.ts
@@ -0,0 +1,10 @@
+import {UserService} from '@loopback/authentication';
+import {BindingKey} from '@loopback/core';
+import {User} from './models';
+import {Credentials} from './user.service';
+
+export namespace UserServiceBindings {
+  export const USER_SERVICE = BindingKey.create<UserService<User, Credentials>>(
+    'services.user.service',
+  );
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/models/index.ts b/extensions/authentication-jwt/src/__tests__/fixtures/models/index.ts
new file mode 100644
index 000000000000..bdc0afd3e7c1
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/models/index.ts
@@ -0,0 +1,2 @@
+export * from './user-credentials.model';
+export * from './user.model';
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/models/user-credentials.model.ts b/extensions/authentication-jwt/src/__tests__/fixtures/models/user-credentials.model.ts
new file mode 100644
index 000000000000..53b26a31160e
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/models/user-credentials.model.ts
@@ -0,0 +1,44 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {Entity, model, property} from '@loopback/repository';
+
+@model({settings: {strict: false}})
+export class UserCredentials extends Entity {
+  @property({
+    type: 'number',
+    id: true,
+  })
+  id: number;
+
+  @property({
+    type: 'string',
+    required: true,
+  })
+  password: string;
+
+  @property({
+    type: 'number',
+    required: true,
+  })
+  userId: number;
+
+  // Define well-known properties here
+
+  // Indexer property to allow additional data
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  [prop: string]: any;
+
+  constructor(data?: Partial<UserCredentials>) {
+    super(data);
+  }
+}
+
+export interface UserCredentialsRelations {
+  // describe navigational properties here
+}
+
+export type UserCredentialsWithRelations = UserCredentials &
+  UserCredentialsRelations;
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/models/user.model.ts b/extensions/authentication-jwt/src/__tests__/fixtures/models/user.model.ts
new file mode 100644
index 000000000000..219595a68d5b
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/models/user.model.ts
@@ -0,0 +1,70 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {Entity, hasOne, model, property} from '@loopback/repository';
+import {UserCredentials} from './user-credentials.model';
+
+@model({
+  settings: {
+    strict: false,
+  },
+})
+export class User extends Entity {
+  // must keep it
+  @property({
+    type: 'number',
+    id: 1,
+    generated: false,
+    updateOnly: true,
+  })
+  id: number;
+
+  @property({
+    type: 'string',
+  })
+  realm?: string;
+
+  // must keep it
+  @property({
+    type: 'string',
+  })
+  username?: string;
+
+  // must keep it
+  @property({
+    type: 'string',
+    required: true,
+  })
+  email: string;
+
+  @property({
+    type: 'boolean',
+  })
+  emailVerified?: boolean;
+
+  @property({
+    type: 'string',
+  })
+  verificationToken?: string;
+
+  @hasOne(() => UserCredentials)
+  userCredentials: UserCredentials;
+
+  // Define well-known properties here
+
+  // Indexer property to allow additional data
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  [prop: string]: any;
+
+  constructor(data?: Partial<User>) {
+    super(data);
+  }
+}
+
+export interface UserRelations {
+  // describe navigational properties here
+}
+
+export type UserWithRelations = User & UserRelations;
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/repositories/index.ts b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/index.ts
new file mode 100644
index 000000000000..7041ea28ec98
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/index.ts
@@ -0,0 +1,2 @@
+export * from './user-credentials.repository';
+export * from './user.repository';
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user-credentials.repository.ts b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user-credentials.repository.ts
new file mode 100644
index 000000000000..bf1adcd8c582
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user-credentials.repository.ts
@@ -0,0 +1,19 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {inject} from '@loopback/core';
+import {DefaultCrudRepository} from '@loopback/repository';
+import {DbDataSource} from '../datasources/db.datasource';
+import {UserCredentials, UserCredentialsRelations} from '../models';
+
+export class UserCredentialsRepository extends DefaultCrudRepository<
+  UserCredentials,
+  typeof UserCredentials.prototype.id,
+  UserCredentialsRelations
+> {
+  constructor(@inject('datasources.db') dataSource: DbDataSource) {
+    super(UserCredentials, dataSource);
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user.repository.ts b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user.repository.ts
new file mode 100644
index 000000000000..c3d9b03ae4f9
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/repositories/user.repository.ts
@@ -0,0 +1,56 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {Getter, inject} from '@loopback/core';
+import {
+  DefaultCrudRepository,
+  HasOneRepositoryFactory,
+  repository,
+} from '@loopback/repository';
+import {DbDataSource} from '../datasources/db.datasource';
+import {User, UserCredentials, UserRelations} from '../models/';
+import {UserCredentialsRepository} from './user-credentials.repository';
+
+export class UserRepository extends DefaultCrudRepository<
+  User,
+  typeof User.prototype.id,
+  UserRelations
+> {
+  public readonly userCredentials: HasOneRepositoryFactory<
+    UserCredentials,
+    typeof User.prototype.id
+  >;
+
+  constructor(
+    @inject('datasources.db') dataSource: DbDataSource,
+    @repository.getter('UserCredentialsRepository')
+    protected userCredentialsRepositoryGetter: Getter<
+      UserCredentialsRepository
+    >,
+  ) {
+    super(User, dataSource);
+    this.userCredentials = this.createHasOneRepositoryFactoryFor(
+      'userCredentials',
+      userCredentialsRepositoryGetter,
+    );
+    this.registerInclusionResolver(
+      'userCredentials',
+      this.userCredentials.inclusionResolver,
+    );
+  }
+
+  async findCredentials(
+    userId: typeof User.prototype.id,
+  ): Promise<UserCredentials | undefined> {
+    try {
+      return await this.userCredentials(userId).get();
+    } catch (err) {
+      if (err.code === 'ENTITY_NOT_FOUND') {
+        return undefined;
+      }
+      throw err;
+    }
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/sequence.ts b/extensions/authentication-jwt/src/__tests__/fixtures/sequence.ts
new file mode 100644
index 000000000000..ef79e59873d7
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/sequence.ts
@@ -0,0 +1,62 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {
+  AuthenticateFn,
+  AuthenticationBindings,
+  AUTHENTICATION_STRATEGY_NOT_FOUND,
+  USER_PROFILE_NOT_FOUND,
+} from '@loopback/authentication';
+import {Context, inject} from '@loopback/core';
+import {
+  FindRoute,
+  InvokeMethod,
+  ParseParams,
+  Reject,
+  RequestContext,
+  RestBindings,
+  Send,
+  SequenceHandler,
+} from '@loopback/rest';
+
+const SequenceActions = RestBindings.SequenceActions;
+
+export class MySequence implements SequenceHandler {
+  constructor(
+    @inject(RestBindings.Http.CONTEXT) public ctx: Context,
+    @inject(SequenceActions.FIND_ROUTE) protected findRoute: FindRoute,
+    @inject(SequenceActions.PARSE_PARAMS) protected parseParams: ParseParams,
+    @inject(SequenceActions.INVOKE_METHOD) protected invoke: InvokeMethod,
+    @inject(SequenceActions.SEND) public send: Send,
+    @inject(SequenceActions.REJECT) public reject: Reject,
+    // - enable jwt auth -
+    // inject the auth action
+    @inject(AuthenticationBindings.AUTH_ACTION)
+    protected authenticateRequest: AuthenticateFn,
+  ) {}
+
+  async handle(context: RequestContext) {
+    try {
+      const {request, response} = context;
+      const route = this.findRoute(request);
+
+      // - enable jwt auth -
+      // call authentication action
+      await this.authenticateRequest(request);
+
+      const args = await this.parseParams(request, route);
+      const result = await this.invoke(route, args);
+      this.send(response, result);
+    } catch (error) {
+      if (
+        error.code === AUTHENTICATION_STRATEGY_NOT_FOUND ||
+        error.code === USER_PROFILE_NOT_FOUND
+      ) {
+        Object.assign(error, {statusCode: 401 /* Unauthorized */});
+      }
+      this.reject(context, error);
+    }
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/fixtures/user.service.ts b/extensions/authentication-jwt/src/__tests__/fixtures/user.service.ts
new file mode 100644
index 000000000000..d002bf97b078
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/fixtures/user.service.ts
@@ -0,0 +1,65 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {UserService} from '@loopback/authentication';
+import {repository} from '@loopback/repository';
+import {HttpErrors} from '@loopback/rest';
+import {securityId, UserProfile} from '@loopback/security';
+import {compare} from 'bcryptjs';
+import {User} from './models/user.model';
+import {UserRepository} from './repositories/user.repository';
+
+/**
+ * A pre-defined type for user credentials. It assumes a user logs in
+ * using the email and password. You can modify it if your app has different credential fields
+ */
+export type Credentials = {
+  email: string;
+  password: string;
+};
+
+export class MyUserService implements UserService<User, Credentials> {
+  constructor(
+    @repository(UserRepository) public userRepository: UserRepository,
+  ) {}
+
+  async verifyCredentials(credentials: Credentials): Promise<User> {
+    const invalidCredentialsError = 'Invalid email or password.';
+
+    const foundUser = await this.userRepository.findOne({
+      where: {email: credentials.email},
+    });
+    if (!foundUser) {
+      throw new HttpErrors.Unauthorized(invalidCredentialsError);
+    }
+
+    const credentialsFound = await this.userRepository.findCredentials(
+      foundUser.id,
+    );
+    if (!credentialsFound) {
+      throw new HttpErrors.Unauthorized(invalidCredentialsError);
+    }
+
+    const passwordMatched = await compare(
+      credentials.password,
+      credentialsFound.password,
+    );
+
+    if (!passwordMatched) {
+      throw new HttpErrors.Unauthorized(invalidCredentialsError);
+    }
+
+    return foundUser;
+  }
+
+  convertToUserProfile(user: User): UserProfile {
+    return {
+      [securityId]: user.id.toString(),
+      name: user.username,
+      id: user.id,
+      email: user.email,
+    };
+  }
+}
diff --git a/extensions/authentication-jwt/src/__tests__/unit/jwt.service.ts b/extensions/authentication-jwt/src/__tests__/unit/jwt.service.ts
new file mode 100644
index 000000000000..231fceb7437c
--- /dev/null
+++ b/extensions/authentication-jwt/src/__tests__/unit/jwt.service.ts
@@ -0,0 +1,42 @@
+import {HttpErrors} from '@loopback/rest';
+import {securityId} from '@loopback/security';
+import {expect} from '@loopback/testlab';
+import {JWTService} from '../../';
+
+describe('token service', () => {
+  const USER_PROFILE = {
+    email: 'test@email.com',
+    [securityId]: '1',
+    name: 'test',
+  };
+  // the jwt service only preserves field 'id' and 'name'
+  const DECODED_USER_PROFILE = {
+    id: '1',
+    name: 'test',
+  };
+  const TOKEN_SECRET_VALUE = 'myjwts3cr3t';
+  const TOKEN_EXPIRES_IN_VALUE = '60';
+  const jwtService = new JWTService(TOKEN_SECRET_VALUE, TOKEN_EXPIRES_IN_VALUE);
+
+  it('token service generateToken() succeeds', async () => {
+    const token = await jwtService.generateToken(USER_PROFILE);
+    expect(token).to.not.be.empty();
+  });
+
+  it('token service verifyToken() succeeds', async () => {
+    const token = await jwtService.generateToken(USER_PROFILE);
+    const userProfileFromToken = await jwtService.verifyToken(token);
+
+    expect(userProfileFromToken).to.deepEqual(DECODED_USER_PROFILE);
+  });
+
+  it('token service verifyToken() fails', async () => {
+    const expectedError = new HttpErrors.Unauthorized(
+      `Error verifying token : invalid token`,
+    );
+    const invalidToken = 'aaa.bbb.ccc';
+    await expect(jwtService.verifyToken(invalidToken)).to.be.rejectedWith(
+      expectedError,
+    );
+  });
+});
diff --git a/extensions/authentication-jwt/src/index.ts b/extensions/authentication-jwt/src/index.ts
new file mode 100644
index 000000000000..08cfb9675a1a
--- /dev/null
+++ b/extensions/authentication-jwt/src/index.ts
@@ -0,0 +1,3 @@
+export * from './jwt-authentication-component';
+export * from './keys';
+export * from './services';
diff --git a/extensions/authentication-jwt/src/jwt-authentication-component.ts b/extensions/authentication-jwt/src/jwt-authentication-component.ts
new file mode 100644
index 000000000000..9145d3acf688
--- /dev/null
+++ b/extensions/authentication-jwt/src/jwt-authentication-component.ts
@@ -0,0 +1,30 @@
+import {registerAuthenticationStrategy} from '@loopback/authentication';
+import {
+  Application,
+  Binding,
+  Component,
+  CoreBindings,
+  inject,
+} from '@loopback/core';
+import {TokenServiceBindings, TokenServiceConstants} from './keys';
+import {JWTAuthenticationStrategy} from './services/jwt.auth.strategy';
+import {JWTService} from './services/jwt.service';
+
+export class JWTAuthenticationComponent implements Component {
+  bindings = [
+    // token bindings
+    Binding.bind(TokenServiceBindings.TOKEN_SECRET).to(
+      TokenServiceConstants.TOKEN_SECRET_VALUE,
+    ),
+    Binding.bind(TokenServiceBindings.TOKEN_EXPIRES_IN).to(
+      TokenServiceConstants.TOKEN_EXPIRES_IN_VALUE,
+    ),
+    Binding.bind(TokenServiceBindings.TOKEN_SERVICE).toClass(JWTService),
+
+    // // user bindings
+    // Binding.bind(UserServiceBindings.USER_SERVICE).toClass(MyUserService)
+  ];
+  constructor(@inject(CoreBindings.APPLICATION_INSTANCE) app: Application) {
+    registerAuthenticationStrategy(app, JWTAuthenticationStrategy);
+  }
+}
diff --git a/extensions/authentication-jwt/src/keys.ts b/extensions/authentication-jwt/src/keys.ts
new file mode 100644
index 000000000000..5e0d37245ed3
--- /dev/null
+++ b/extensions/authentication-jwt/src/keys.ts
@@ -0,0 +1,19 @@
+import {TokenService} from '@loopback/authentication';
+import {BindingKey} from '@loopback/core';
+
+export namespace TokenServiceConstants {
+  export const TOKEN_SECRET_VALUE = 'myjwts3cr3t';
+  export const TOKEN_EXPIRES_IN_VALUE = '21600';
+}
+
+export namespace TokenServiceBindings {
+  export const TOKEN_SECRET = BindingKey.create<string>(
+    'authentication.jwt.secret',
+  );
+  export const TOKEN_EXPIRES_IN = BindingKey.create<string>(
+    'authentication.jwt.expires.in.seconds',
+  );
+  export const TOKEN_SERVICE = BindingKey.create<TokenService>(
+    'services.authentication.jwt.tokenservice',
+  );
+}
diff --git a/extensions/authentication-jwt/src/services/index.ts b/extensions/authentication-jwt/src/services/index.ts
new file mode 100644
index 000000000000..d6b42a113add
--- /dev/null
+++ b/extensions/authentication-jwt/src/services/index.ts
@@ -0,0 +1,3 @@
+export * from './jwt.auth.strategy';
+export * from './jwt.service';
+export * from './security.spec';
diff --git a/extensions/authentication-jwt/src/services/jwt.auth.strategy.ts b/extensions/authentication-jwt/src/services/jwt.auth.strategy.ts
new file mode 100644
index 000000000000..071a5d541a1d
--- /dev/null
+++ b/extensions/authentication-jwt/src/services/jwt.auth.strategy.ts
@@ -0,0 +1,50 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {AuthenticationStrategy, TokenService} from '@loopback/authentication';
+import {inject} from '@loopback/core';
+import {HttpErrors, Request} from '@loopback/rest';
+import {UserProfile} from '@loopback/security';
+import {TokenServiceBindings} from '../keys';
+
+export class JWTAuthenticationStrategy implements AuthenticationStrategy {
+  name = 'jwt';
+
+  constructor(
+    @inject(TokenServiceBindings.TOKEN_SERVICE)
+    public tokenService: TokenService,
+  ) {}
+
+  async authenticate(request: Request): Promise<UserProfile | undefined> {
+    const token: string = this.extractCredentials(request);
+    const userProfile: UserProfile = await this.tokenService.verifyToken(token);
+    return userProfile;
+  }
+
+  extractCredentials(request: Request): string {
+    if (!request.headers.authorization) {
+      throw new HttpErrors.Unauthorized(`Authorization header not found.`);
+    }
+
+    // for example : Bearer xxx.yyy.zzz
+    const authHeaderValue = request.headers.authorization;
+
+    if (!authHeaderValue.startsWith('Bearer')) {
+      throw new HttpErrors.Unauthorized(
+        `Authorization header is not of type 'Bearer'.`,
+      );
+    }
+
+    //split the string into 2 parts : 'Bearer ' and the `xxx.yyy.zzz`
+    const parts = authHeaderValue.split(' ');
+    if (parts.length !== 2)
+      throw new HttpErrors.Unauthorized(
+        `Authorization header value has too many parts. It must follow the pattern: 'Bearer xx.yy.zz' where xx.yy.zz is a valid JWT token.`,
+      );
+    const token = parts[1];
+
+    return token;
+  }
+}
diff --git a/extensions/authentication-jwt/src/services/jwt.service.ts b/extensions/authentication-jwt/src/services/jwt.service.ts
new file mode 100644
index 000000000000..41b6705e23c5
--- /dev/null
+++ b/extensions/authentication-jwt/src/services/jwt.service.ts
@@ -0,0 +1,77 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {TokenService} from '@loopback/authentication';
+import {inject} from '@loopback/core';
+import {HttpErrors} from '@loopback/rest';
+import {securityId, UserProfile} from '@loopback/security';
+import {promisify} from 'util';
+import {TokenServiceBindings} from '../keys';
+
+const jwt = require('jsonwebtoken');
+const signAsync = promisify(jwt.sign);
+const verifyAsync = promisify(jwt.verify);
+
+export class JWTService implements TokenService {
+  constructor(
+    @inject(TokenServiceBindings.TOKEN_SECRET)
+    private jwtSecret: string,
+    @inject(TokenServiceBindings.TOKEN_EXPIRES_IN)
+    private jwtExpiresIn: string,
+  ) {}
+
+  async verifyToken(token: string): Promise<UserProfile> {
+    if (!token) {
+      throw new HttpErrors.Unauthorized(
+        `Error verifying token : 'token' is null`,
+      );
+    }
+
+    let userProfile: UserProfile;
+
+    try {
+      // decode user profile from token
+      const decodedToken = await verifyAsync(token, this.jwtSecret);
+      // don't copy over  token field 'iat' and 'exp', nor 'email' to user profile
+      userProfile = Object.assign(
+        {[securityId]: '', name: ''},
+        {
+          [securityId]: decodedToken.id,
+          name: decodedToken.name,
+          id: decodedToken.id,
+        },
+      );
+    } catch (error) {
+      throw new HttpErrors.Unauthorized(
+        `Error verifying token : ${error.message}`,
+      );
+    }
+    return userProfile;
+  }
+
+  async generateToken(userProfile: UserProfile): Promise<string> {
+    if (!userProfile) {
+      throw new HttpErrors.Unauthorized(
+        'Error generating token : userProfile is null',
+      );
+    }
+    const userInfoForToken = {
+      id: userProfile[securityId],
+      name: userProfile.name,
+      email: userProfile.email,
+    };
+    // Generate a JSON Web Token
+    let token: string;
+    try {
+      token = await signAsync(userInfoForToken, this.jwtSecret, {
+        expiresIn: Number(this.jwtExpiresIn),
+      });
+    } catch (error) {
+      throw new HttpErrors.Unauthorized(`Error encoding token : ${error}`);
+    }
+
+    return token;
+  }
+}
diff --git a/extensions/authentication-jwt/src/services/security.spec.ts b/extensions/authentication-jwt/src/services/security.spec.ts
new file mode 100644
index 000000000000..978a965cca3a
--- /dev/null
+++ b/extensions/authentication-jwt/src/services/security.spec.ts
@@ -0,0 +1,18 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/extension-authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {ReferenceObject, SecuritySchemeObject} from '@loopback/openapi-v3';
+
+export const OPERATION_SECURITY_SPEC = [{jwt: []}];
+export type SecuritySchemeObjects = {
+  [securityScheme: string]: SecuritySchemeObject | ReferenceObject;
+};
+export const SECURITY_SCHEME_SPEC: SecuritySchemeObjects = {
+  jwt: {
+    type: 'http',
+    scheme: 'bearer',
+    bearerFormat: 'JWT',
+  },
+};
diff --git a/extensions/authentication-jwt/tsconfig.build.json b/extensions/authentication-jwt/tsconfig.build.json
new file mode 100644
index 000000000000..c7b8e49eaca5
--- /dev/null
+++ b/extensions/authentication-jwt/tsconfig.build.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "http://json.schemastore.org/tsconfig",
+  "extends": "@loopback/build/config/tsconfig.common.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src"]
+}