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Question

Alice encrypts a message m to send to Bob by computing:

(m + 51) mod 83.


If the

cyphertext that Alice sends is 11, then what was the original message?

Top Answer

After applying the decryption method, outcome or the original message (m) is 43. Cryptography is a mechanism... View the full answer

Decryption.jpg

Solution
Alice encoupt a message m
(m+ 51 ) mod 83
- Cipbesitext that Alice sends = 11
Encrypt c = (m+k ) mod N.
C = 1 1
K = 51
WW = 83
21 = (m+ 51) mod 83
It means that ( m+ 51) - 41
gives an...

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