KERBEROS

• Started as MIT's project Athena
• Provides authentication and message protection
• Uses symmetric key cryptography
• Provides end-to-end security
• Key Distribution Center(KDC)
• Holds all cryptographic keys
• Ticket
• Generated by the KDC to authenticate a subject
• Authentication service
• Part of the KDC that authenticate subjects and objects
• Kerberos Process
• Subject submit requests to access object via KDC
• KDC evaluates and sends Subject a Ticket
• Subject submits ticket to object
• Object examines ticket and grant subject access