Kerberos Terminology and Abbreviations

• c client id

• s server id

• addr client’s IP address

• life lifetime of ticket

• TGS ticket granting server

• Kx x’s secret key (x being a client or server)

• Kx,y session key for x and y

• {abc}Kx abc encrypted in x’s key

• Tx,y x’s ticket to use y (used many times)

• Ax authenticator for x, containing x’s name (e.g., zheng.ma@yale.edu, current time (to defeat replay) and checksum