The algorithm(s) used for session encryption can be specified in the sshd2_config file:
The system will attempt to use the different encryption ciphers in the sequence specified on the line. Currently supported cipher names are the following:
Special values for this option are the following:
Any: allows all the ciphers including none
AnyStd: allows only the ciphers mentioned in the IETF Secsh draft and none. The standard ciphers are aes128-cbc, 3des-cbc, twofish128-cbc, cast128-cbc, twofish-cbc, blowfish-cbc, idea-cbc, aes192-cbc, aes256-cbc, twofish192-cbc, twofish256-cbc, and arcfour.
none: no encryption, connection will be in plaintext
AnyCipher: allows any available cipher apart from the non-encrypting cipher mode none
AnyStdCipher: the same as AnyCipher, but includes only those ciphers mentioned in the IETF Secsh draft (excluding none).
The default ciphers are aes128-cbc, aes192-cbc, aes256-cbc and 3des-cbc.
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