Operations that transform a plaintext into a ciphertext with cryptographic properties, also called a cipher. There are symmetric, asymmetric, and hash cipher types.

Operations that transform a plaintext into a ciphertext with cryptographic properties, also called a cipher. There are symmetric, asymmetric, and hash cipher types.

• A. Cipher
• B. Ciphertext
• C. Plaintext
• D. Algorithm

Answer: (A)

Encryption relies on a cipher to turn plaintext into ciphertext. A cipher is the method or algorithm used to perform that cryptographic transformation, and it can be applied in symmetric schemes (same key for encryption and decryption) or asymmetric schemes (different keys). The ciphertext is the result of applying the cipher to the plaintext, while the plaintext is the original, readable data before encryption. Hash functions are a separate cryptographic primitive used for data integrity and are not reversible, so they aren’t ciphers for encryption. Therefore, the best term for the operation that converts plaintext into ciphertext is cipher, since it defines the mechanism that carries out the cryptographic transformation.

Encryption relies on a cipher to turn plaintext into ciphertext. A cipher is the method or algorithm used to perform that cryptographic transformation, and it can be applied in symmetric schemes (same key for encryption and decryption) or asymmetric schemes (different keys). The ciphertext is the result of applying the cipher to the plaintext, while the plaintext is the original, readable data before encryption. Hash functions are a separate cryptographic primitive used for data integrity and are not reversible, so they aren’t ciphers for encryption. Therefore, the best term for the operation that converts plaintext into ciphertext is cipher, since it defines the mechanism that carries out the cryptographic transformation.