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Create a project to transmit a message from Alice to Bob maintaining message integrity. Use the protocol presented in the attached slide. (1) Write a program named "ALICE" that accepts a message M from the keyboard and does the following: (a) Computes a hash of M, h=H(M) using a cryptographic hash function (use existing hash library) (b) Encrypt "h" using Alice's private RSA key (use RSA library) (c) Saves "M" and encrypted "h" in a file named "Integrity.txt" (2) Write a second program named "BOB" that reads "M" and the encrypted "h" from the file "Integrity.txt" (a) Computes a hash of M, h=H(M) using a cryptographic hash function (use existing hash library) (b) Decrypt the encrypted "h" using Alice's public RSA key (use RSA library) (c) Determines if message integrity is maintained
Sagot :
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