Key Distribution Center (KDC) concept
Last updated
Last updated
TTP is responsible for bridging the gap between peers.
A and B don’t have any shared information.
A and B have shared information with TTP.
Because a TTP can distribute a session key to A and B to prove each other's identity.
Session key
It is temporary (only for one session).
A uses to prove its identity is B.
B uses to prove its identity is A.
The proofs by A and B can be made in different ways.
Only at the beginning of a session.
On each interaction in a session.