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Authors:
James F. Kurose, Keith W. Ross
Chapter:
Security In Computer Networks
Exercise:
Review
Question:10 | ISBN:9780132856201 | Edition: 6

Question

Can you “decrypt” a hash of a message to get the original message? Explain your answer.

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Answer

No, “decrypt” a hash of a message to get the original message.

Reason:

  • A hash of a message is a one way transmission function. If change the hash message, then automatically modified the original message.
  • The client receives the original message and hash value by using shared secret key.
  • If the hash value generated is similar to original message then the client decrypt the original message. It is impossible to handle all times.
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