When two different keys encrypt a plaintext message into the same ciphertext, this situation is
known as:

A.
Cryptanalysis.

B.
Public key cryptography.

C.
Hashing.

D.
Key clustering.

Explanation:
The correct answer is “Key clustering” Answer “Public key cryptography” describes a type of
cryptographic system using a public and a private key; answer Cryptanalysis is the art/science of
breaking ciphers; answer Hashing is the conversion of a message of variable length into a fixedlength message digest.