diff --git a/lib/win32/certstore.rb b/lib/win32/certstore.rb
index e5188e1..328d071 100644
--- a/lib/win32/certstore.rb
+++ b/lib/win32/certstore.rb
@@ -70,6 +70,11 @@ def search(certificate_name)
       cert_search(certstore_handler, certificate_name)
     end
 
+    # Validate certificate from open certificate store and return boolean
+    def verify(certificate_name)
+      cert_verify(certstore_handler, certificate_name)
+    end
+
     # To close and destroy pointer of open certificate store handler
     def close
       closed = CertCloseStore(@certstore_handler, CERT_CLOSE_STORE_FORCE_FLAG)
diff --git a/lib/win32/certstore/mixin/helper.rb b/lib/win32/certstore/mixin/helper.rb
index d248f87..f2b0671 100644
--- a/lib/win32/certstore/mixin/helper.rb
+++ b/lib/win32/certstore/mixin/helper.rb
@@ -36,6 +36,11 @@ def cert_ps_cmd(thumbprint)
             $content
           EOH
         end
+
+        # validate certificate not_before and not_after date in UTC
+        def valid_duration(cert_obj)
+          cert_obj.not_before < Time.now.utc && cert_obj.not_after > Time.now.utc
+        end
       end
     end
   end
diff --git a/lib/win32/certstore/store_base.rb b/lib/win32/certstore/store_base.rb
index 0424225..7dc9936 100644
--- a/lib/win32/certstore/store_base.rb
+++ b/lib/win32/certstore/store_base.rb
@@ -102,6 +102,17 @@ def cert_delete(store_handler, certificate_thumbprint)
         cert_delete_flag
       end
 
+      # Verify certificate from open certificate store and return boolean or exceptions
+      # store_handler => Open certificate store handler
+      # certificate_thumbprint => thumbprint is a hash. which could be sha1 or md5.
+      def cert_verify(store_handler, certificate_thumbprint)
+        validate_thumbprint(certificate_thumbprint)
+        thumbprint = update_thumbprint(certificate_thumbprint)
+        cert_pem = get_cert_pem(thumbprint)
+        cert_pem = format_pem(cert_pem)
+        verify_certificate(cert_pem)
+      end
+
       private
 
       # Build arguments for CertAddEncodedCertificateToStore
@@ -140,6 +151,12 @@ def get_rdn(cert_obj)
         cert_obj.issuer.to_s.concat("/").scan(/=(.*?)\//).join(", ")
       end
 
+      # Verify OpenSSL::X509::Certificate object
+      def verify_certificate(cert_pem)
+        return "Certificate not found" if cert_pem.empty?
+        valid_duration(build_openssl_obj(cert_pem))
+      end
+
       # Format pem
       def format_pem(cert_pem)
         cert_pem.delete("\r")
diff --git a/spec/win32/unit/certstore_spec.rb b/spec/win32/unit/certstore_spec.rb
index bbb9e7b..1a6adaa 100644
--- a/spec/win32/unit/certstore_spec.rb
+++ b/spec/win32/unit/certstore_spec.rb
@@ -268,6 +268,84 @@
     end
   end
 
+  describe "#cert_validate" do
+    context "When passing empty certificate store name" do
+      let (:store_name) { "" }
+      it "raises ArgumentError" do
+        expect { certstore.open(store_name) }.to raise_error(ArgumentError, "Invalid Certificate Store.")
+      end
+    end
+
+    context "When passing empty thumbprint" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { " " }
+      it "raises ArgumentError" do
+        store = certstore.open(store_name)
+        expect { store.valid?(thumbprint) }.to raise_error(ArgumentError, "Invalid certificate thumbprint.")
+      end
+    end
+ 
+    context "When passing thumbprint is nil" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { nil }
+      it "raises ArgumentError" do
+        store = certstore.open(store_name)
+        expect { store.valid?(thumbprint) }.to raise_error(ArgumentError, "Invalid certificate thumbprint.")
+      end
+    end
+
+    context "When passing invalid thumbprint" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { "b1bc968bd4f49d622aa89a81f2150152a41d829c" }
+      before(:each) do
+        allow_any_instance_of(certbase).to receive(:get_cert_pem).and_return("")
+      end
+      it "returns Certificate not found" do
+        store = certstore.open(store_name)
+        expect(store.valid?(thumbprint)).to eql("Certificate not found")
+      end
+    end
+
+    context "When passing valid certificate's thumbprint" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { "b1bc968bd4f49d622aa89a81f2150152a41d829909c" }
+      let (:cert_pem) { File.read('.\spec\win32\unit\assets\GlobalSignRootCA.pem') }
+      before(:each) do
+        allow_any_instance_of(certbase).to receive(:get_cert_pem).and_return(cert_pem)
+      end
+      it "returns true" do
+        store = certstore.open(store_name)
+        expect(store.valid?(thumbprint)).to eql(true)
+      end
+    end
+
+    context "When passing valid certificate's thumbprint with spaces" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { "b1 bc 96 8b d4 f4 9d 62 2a a8 9a 81 f2 15 01 52 a4 1d 82 9c" }
+      let (:cert_pem) { File.read('.\spec\win32\unit\assets\GlobalSignRootCA.pem') }
+      before(:each) do
+        allow_any_instance_of(certbase).to receive(:get_cert_pem).and_return(cert_pem)
+      end
+      it "returns true" do
+        store = certstore.open(store_name)
+        expect(store.valid?(thumbprint)).to eql(true)
+      end
+    end
+
+    context "When passing valid certificate's thumbprint with :" do
+      let (:store_name) { "root" }
+      let (:thumbprint) { "b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c" }
+      let (:cert_pem) { File.read('.\spec\win32\unit\assets\GlobalSignRootCA.pem') }
+      before(:each) do
+        allow_any_instance_of(certbase).to receive(:get_cert_pem).and_return(cert_pem)
+      end
+      it "returns true" do
+        store = certstore.open(store_name)
+        expect(store.valid?(thumbprint)).to eql(true)
+      end
+    end
+  end
+
   describe "Perform more than one operations with single certstore object" do
     context "Perform add and list with single certstore object" do
       let (:store_name) { "root" }