How is it possible that anyone can know how a specific algorithm works and it can still provide protection through secrecy?
A.
The source code is not provided
B.
The S-boxes are continually changed through the use of initialization vectors
C.
No one has access to the keystream
D.
Cryptovariables provide the secrecy
Explanation:
The algorithm, the set of rules, dictates how enciphering and
deciphering take place. Many of the mathematical algorithms used in computer systems
today are publicly known and are not the secret part of the encryption process. If
the internal mechanisms of the algorithm are not a secret, then something must be.
The secret piece of using a well-known encryption algorithm is the key.
Cryptovariable is another name for a key.