What is the role of the secret key added to the hash function in Figure 31.17 in

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What is the role of the secret key added to the hash function in Figure 31.17 in the text (MAC)? Explain.

Figure 31.17

Figure 31.17 Message authentication code Alice Bob M: Message K: A shared secret key MAC: Message authentication code K K МАС МАС Hash Hash Same?0 [no] M+ MAC Discard M + MAC Insecure channel M+ MAC [yes] Keep the message

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Data Communications and Networking

ISBN: 978-0073376226

5th edition

Authors: Behrouz A. Forouzan

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Question Posted: Dec 28, 2018 12:36 PM

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What is the role of the secret key added to the hash function in Figure 31.17 in

Question:

Figure 31.17 Message authentication code Alice Bob M: Message K: A shared secret key MAC: Message authentication code K K МАС МАС Hash Hash Same?0 [no] M+ MAC Discard M + MAC Insecure channel M+ MAC [yes] Keep the message

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The secret key eliminates the need ...View the full answer

Data Communications and Networking

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