For the sake of definition, key'''Key clustering''' is when two different keys generate the same [[ciphertext]] from the same [[plaintext]], using same or different [[algorithm]].▼
[[Ciphertext]] is the result of encrypting [[plaintext]] using a key. [[CiphersCipher]]s (or [[algorithms]]) are used to [[encrypt]] the [[plaintext]] using keys. A good [[algorithm]], using different keys on the same [[plaintext]] generates a different [[ciphertext]], irrespective of the key length.
Let us assumeAssume that Ithere haveis a [[plaintext]] P, two keys (of same length, assumed for simplicity) K1 and K2, and an [[algorithm]] A. I will generate [[ciphertexts]]Ciphertexts C1 and C2 with the two keys are generated as follows:
Line 11 ⟶ 12:
P -----A(K2)------> C2
This might not always be the case. I could have possibly gotten C1 [[ciphertext]] in Case 2 as well. That would be '''Key Clustering'''.
▲For the sake of definition, key clustering is when two different keys generate the same ciphertext from the same plaintext, using same or different algorithm.
