krb5: krb5 - is a MIT Kerberos network authentication protocol krb5: krb5: Kerberos is a network authentication protocol. It is designed to provide krb5: strong authentication for client/server applications by using secret-key krb5: cryptography. A free implementation of this protocol is available from krb5: from MIT. krb5: krb5: krb5: krb5: krb5: