Twofish Encryption Cipher

Twofish is a symmetric key block cipher that was designed to be both secure and efficient.
It is one of the algorithms that OpenSSH supports for encrypting SSH sessions.

Twofish is a strong encryption algorithm,
Using it may increase the CPU usage and network latency Twofish is slower than AES, especially on software-based encryption. of your SSH sessions compared to other, faster algorithms like AES.
Additionally, Twofish may not be supported on older or less commonly used SSH clients and servers.

In general, AES is usually a better choice than Twofish AES is hardware-accelerated and widely supported, hardware-accelerators are important for smooth connection. as it is a more standardized encryption algorithm.
It provides CPU acceleration in most modern architectures.
However, for those who are a bit more paranoid, Twofish might be preferred,
as there are online discussions and unverified rumors suggesting AES encryption may contain a backdoor.
It's worth noting that these claims are speculative and unproven.

Twofish is a strong encryption algorithm,
Using it may increase the CPU usage and network latency Twofish is slower than AES, especially on software-based encryption. of your SSH sessions compared to other, faster algorithms like AES.
Additionally, Twofish may not be supported on older or less commonly used SSH clients and servers.

Check if Twofish is supported:

  ssh -Q cipher | grep twofish    Copy

If Twofish is supported, you should see the output twofish256-cbc This means your OpenSSH installation supports Twofish. .

Configure OpenSSH to use Twofish: To use Twofish as the encryption algorithm for your SSH sessions,
add the following line to your SSH client configuration file (typically ~/.ssh/config):

  Ciphers twofish256-cbc    Copy

This tells OpenSSH to use Twofish with a 256-bit key for encrypting your SSH sessions.

Test your configuration: After adding the Ciphers line to your SSH client config file,
connect to a remote SSH server using the ssh -v command.
Look for a log line similar to: "Using cipher twofish256-cbc" This confirms that your SSH session is encrypted using Twofish.

Both the SSH server and client must support Twofish If the server or client does not have support for Twofish, it will not be used even if configured. to use it for encryption.
If the server lacks Twofish support, an SSH session encrypted with Twofish cannot be established,
even if your client is configured to use it.

Therefore, if you plan to use Twofish encryption for SSH sessions, ensure the target SSH server supports Twofish.
If you're running your own server, you may need to recompile OpenSSH with the correct flags to enable Twofish:

  --with-cipher=twofish    Copy