Message Authentication Code and Public Key Cryptosystem Questions

Message Authentication Code and Public Key Cryptosystem Questions

Hi, Please write in question and answer format.

  • List three approaches to message authentication.
  • What is a message authentication code?
  • What properties must a hash function have to be useful for message authentication?
  • In the context of a hash function, what is a compression function?
  • What are the principal ingredients of a public-key cryptosystem?
  • List and briefly define three uses of a public-key cryptosystem.
  • What is the difference between a private key and a secret key?
  • What is a digital signature?

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