RLPx AES CTR keystream reusage #1315 (SEC-50 ) : Case for private network

[banquedefrance-blockchain]

Hi, does Besu RLPx implementation solve this issue?
ethereum/go-ethereum#1315

In case of a private network, what are the potential impacts, if any?

from ethereum/devp2p#32 :
"The two sides of a RLPx connection generate two CTR streams from the same key, nonce and IV.
If an attacker knows one plaintext, he can decrypt unknown plaintexts of the reused keystream.
Separate keys needs to be used for each stream. See for example the TLS 1.2 RFC 5246 section 6.3."

In the case of a private network, here is a fix proposed for rlpx.go:

LaurentMT/go-ethereum@e8cba72

Regards,