ceasar cipher

Tasks to be performed 1. Edit VBA program for encryption of the plaintext by Caesar cipher. Save it as .xlsm file, where m means macro, otherwise file wouldn’t work on teacher’s side. 2. Try to encrypt the message to your PC lab’s neighbour and ask him to find a...

Cryptography

a. During the key exchange, sender and receiver can calculate the final shared key. Please prove the calculated shared keys K of the sender and receiver are the same. b. If we don’t use digital signature together with the Diffie-Hellman key exchange, will it be...
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