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  3. . the following is a key exchange protocol used by

. The following is a key exchange protocol used by two clients, A and B, to...

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Programming

. The following is a key exchange protocol used by two clients,A and B, to obtain a symmetric key???, using a trusted server, S.Assume that A and B had previously obtained the symmetric keys ???and ??? securely with the server. Also assume that anyone cansecurely obtain a secret symmetric key with the server. I. A → S :A, B II. S → A : (???) ??? ,( ???) ??? III. A → B : (???) ??? , A •Identify the attack that can be executed against this protocol,assuming that an attacker C can eavesdrop, block, or modify allmessages. The attacker also has access to old (expired) keys.

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1 ANSWER GIVENTHAT As Per above Problem Client A and B are trying to communicate using symmetrickey exchange protocol Example for SysmmetricKey Exchange Algorithm isAES DES Blowfish RC4    See Answer
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