Kerberos ( pronounced \/ Ë kÉ rbÉ rÉ s \/ `` kur-ber-uhs '' ) is a computer network authentication protocol , which allows people communicating over a non-secure network to prove their identity to one another in a secure manner . Kerberos is a computer network authentication protocol , which allows nodes communicating over a non-secure network to prove their identity to one another in a secure manner .