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Encryption Schemes used by OpenSSH

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linux-howto

http://lpilinux.com – there are 3 types of encryption( Ciphers ) used by ssh idea, 3des & blowfish. unless explicitly mentioned ssh by default uses idea cipher to encrypt & decrypt. Bruce Schneier’s block cipher blowfish was designed to be fast & secure, it uses a 128 bit key, although the algorithm allows anything from 32 to 448 bits. We can explicitly mention the ssh client to use a certain type of encryption by using the following command # slogin -2 (HowTos)