“Yahalom (protocol)”的意思、由来-开放百科全书

词条

Yahalom (protocol)

释义

Protocol description
See also
References

Yahalom is an authentication and secure key-sharing protocol designed for use on an insecure network such as the Internet. Yahalom uses a trusted arbitrator to distribute a shared key between two people. This protocol can be considered as an improved version of Wide Mouth Frog protocol (with additional protection against man-in-the-middle attack), but less secure than the Needham–Schroeder protocol.

Protocol description

If Alice (A) initiates the communication to Bob (B) with S is a server trusted by both parties, the protocol can be specified as follows using security protocol notation:

A and B are identities of Alice and Bob respectively
is a symmetric key known only to A and S
is a symmetric key known only to B and S
and are nonces generated by A and B respectively
is a symmetric, generated key, which will be the session key of the session between A and B

Alice sends a message to Bob requesting communication.

Bob sends a message to the Server encrypted under .

The Server sends to Alice a message containing the generated session key and a message to be forwarded to Bob.

Alice forwards the message to Bob and verifies has not changed. Bob will verify has not changed when he receives the message.

References

{{cite book

|last = Schneier
|first = Bruce
|authorlink = Bruce Schneier
|title = Applied Cryptography
|publisher = John Wiley & Sons
|year = 1996
|pages = 57–58
|isbn = 0-471-12845-7}}

M. Burrows, M. Abadi, R. Needham A Logic of Authentication, Research Report 39, Digital Equipment Corp. Systems Research Center, Feb. 1989
M. Burrows, M. Abadi, R. Needham A Logic of Authentication. ACM Transactions on Computer Systems, v. 8, n. 1, Feb. 1990, pp. 18—36

2 : Cryptographic protocols|Computer access control protocols

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Protocol description

See also

References