Nicknames

The server's DES authentication subsystem returns a nickname to the client in the verifier response to the first transaction.

The nickname is an unsigned integer. The nickname is likely to be an index into a table on the server that stores each client's net name, decrypted DES key, and window. The client can use the nickname in all subsequent transactions instead of passing its net name, encrypted DES key, and window each time. The nickname is not required, but it saves time.