Question

what is cryptology and algorithm

Answer 1

The study of codes or the art of writing and solving them is called cryptology .
The process or set of rules to be followed in calculations or other problem solving operations , especially by a computer is called algorithm .

Answer 2

Decryption is the reverse, in other words, moving from the unintelligible ciphertext back to plaintext. A cipher (or cypher) is a pair of algorithms that create the encryption and the reversing decryption. The detailed operation of a cipher is controlled both by the algorithm and in each instance by a "key".

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