What encryption algorithms does Xshell support?

The supported ciphers are AES128/192/256, 3DES, BLOWFISH, CAST128, ARCFOUR, and RIJNDAEL. And Xshell supports SHA1, SHA1-96, MD5, MD5-96, and RIPEMD160 MAC algorithms.

You can configure multiple ciphers and MAC algorithms to be tried in order of the appearance in the list.