Your organization's enterprise implements several different encryption algorithms, based on the organizational needs and the data being protected. Recently, several different encryption keys have generated the same ciphertext from the same plaintext message. This has resulted in your organization's enterprise being susceptible to attackers. Which condition has occurred?
a. key clustering
b. cryptanalysis
c. keyspace
d. confusion
Answer: A. Explanation: Key clustering occurs when different encryption keys generate the same ciphertext from the same plaintext message. Cryptanalysis is the science of decrypting ciphertext without prior knowledge of the key or cryptosystem used. A keyspace is all the possible key values when using a particular algorithm or other security measure. Confusion is the process of changing a key value during each round of encryption.