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The chart below shows an authentication protocol, followed by data exchange, followedby disconnection. Only an initial part of the authentication protocol is shown; here, pw
The chart below shows an authentication protocol, followed by data exchange, followedby disconnection. Only an initial part of the authentication protocol is shown; here, pw is As password, J is a key derived from pw and L is a highquality key. Assume an attacker that can eavesdrop messages and intercept and spoof messages sent by A but not those sent by B Complete the authentication protocol ie Supply the part indicated by the so that in spite of this attacker B authenticates A this authentication is not vulnerable to offline password guessing, and A and B establish a session key S for encrypting data such that after A and B disconnect and forget even if the attacker learns pw the attacker cannot decrypt the data exchanged.
The chart below shows an authentication protocol, followed by data exchange, followedby disconnection. Only an initial part of the authentication protocol is shown; here,
pw is As password, J is a key derived from pw and L is a highquality key. Assume
an attacker that can eavesdrop messages and intercept and spoof messages sent
by A but not those sent by B Complete the authentication protocol ie Supply
the part indicated by the so that in spite of this attacker
B authenticates A
this authentication is not vulnerable to offline password guessing, and
A and B establish a session key S for encrypting data such that after A and
B disconnect and forget even if the attacker learns pw the attacker cannot
decrypt the data exchanged.
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