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Components
F
Key Exchange Method
Name
ADH (Anonymous Diffie-Hellman)
Security
The anonymous Diffie-Hellman[404] key exchange[133] is a variant of Diffie-Hellman[99][100][101][102][103] key exchange that does not provide authenticity[75][76][77]. Lack of authentication causes that the identity of server cannot be proved, so connection is open for a man-in-the-middle attack[61].
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server or replace the cipher suite with it's Ephemeral Diffie-Hellman[405][406][407][408] version.
F
Authentication Method
Name
anon
Security
Lack of authentication is combined with anonymous key exchange[397][398], identity of server cannot be proved, so connection is open for a man-in-the-middle attack[61].
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.
B
Encryption Type
Name
Camellia-256
Security
Encryption algorithm Camellia[318][319][320][321] is a block cipher[78][79][80][81] which is considered secure[322][323], but leading client applications do not use this algorithm. Unless your application or requirements specifically call for their use, it is generally safer to avoid cipher suites that are not adopted and supported by a critical mass of the industry.
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.
Remove the cipher suite from the list of cipher suites supported by your server or at least set the cipher suite order explicitly and any cipher suite modes be preferred over ciphers suites with CBC modes.
A+
Encryption Key Size
Name
256
Security
The symmetric key[185][186][187] withkey size[184] more than 128 bits as it is should be according to National Institute of Standards and Technology[470][471] so it is not vulnerable to preimage attack[67] and it cannreliably prove that message came from the stated sender (its authenticity) and has not been changed, so connection is not open for a man-in-the-middle attack[61].
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.