Formal Analysis of the Security Protocol with Timestamp Using SPIN

Table 1

Basic symbols and meanings.

Symbol	Meaning
P	Authentication and key agreement protocol
Init	Protocol initiator
Rec	Protocol responder
Ser	Trusted server
sk	Session key generated by the protocol initiator
Ts	The generation time of sk
Tn	The reception time of sk
Dmax	Maximum time spent in message transmission
Dmin	Minimum time spent in message transmission
N	The number of messages in a protocol