Digital signatures are used for public key authentication (including certificate authentication). The authenticating party uses the digital signature to confirm that the party being authenticated holds the correct private key. The Secure Shell client uses a digital signature to authenticate the host. The Secure Shell server uses a digital signature to authenticate the client when public key authentication is configured.
Reflection for Secure IT, Client and Server for UNIX supports the following digital signature algorithms:
x509v3-rsa2048-sha256
x509v3-sign-rsa
x509v3-sign-dss
ssh-rsa-sha2-256@attachmate.com
ssh-rsa
ssh-dss