hw11solution

hw11solution - c Answer: Alice should use Bob's public key...

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Sheet1 Page 1 hw 11 solution 1. In authentication, is it necessary to encrypt the entire message? Answer: No it is not necessary. Authentication means to verify the sender of the message, it does not require confidentiality, s o 2. If Alice wants to send a secure message to Bob using private/public key encryption, which key should be used to do the en
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Unformatted text preview: c Answer: Alice should use Bob's public key to encrypt the message. This way Bob's private key must be used to do the decryp t 3. Do you think the FCS field in the Ethernet frame can be used for authentication? Answer: No, it is not possible. There is no security in the Ethernet FCS field. Suppose a middleman intercepts an Ethernet fra m...
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