The Key Validation tab allows you to add and remove public keys for other servers.
To add a public key:
For example, if you possess the following public key:
---- BEGIN SSH2 PUBLIC KEY ---- AAAAB3NzaC1yc2EAAAABJQAAAIBrxx+YqQARTVMHfyyjisoQvBZoxvBMxf9CbXoo VpWHBezQbm3anaav+4rEPIylcfFrIR/9o3/IdXT+arnXlrZ+7v3kBVx9SRWr5GY1 BtPFElVQi1PJz/tXTp3erWyoz4mwsb0kmoFAPc9LBrwrLtSlkrXezzrKZMa4VzB9 yK6dAQ== ---- END SSH2 PUBLIC KEY ----
copy the actual key part and paste it into the Key field.
AAAAB3NzaC1yc2EAAAABJQAAAIBrxx+YqQARTVMHfyyjisoQvBZoxvBMxf9CbXoo VpWHBezQbm3anaav+4rEPIylcfFrIR/9o3/IdXT+arnXlrZ+7v3kBVx9SRWr5GY1 BtPFElVQi1PJz/tXTp3erWyoz4mwsb0kmoFAPc9LBrwrLtSlkrXezzrKZMa4VzB9 yK6dAQ==