1 assume that we use the following notations a b e k apriv e k bpub h m z m this mea 5346389

1) Assume that we use the following notations:

A
  B: E(K
Apriv,E(K
Bpub, H(M) || Z(M) ))

                             

This means A computes the Hash function of the message M asH(M), concatenates with the compressed value of M as Z(M),then encrypts the result using first the public key of B[KBpub ] and then encrypts the result with the privatekey of A [KApriv ]. A then transmits theresult to B.

Using these notations, indicate the message M sent by A to Butilizing the authentication and confidentiality of PGP.

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