Correct Answer (Detailed Explanation is Below)
C.
Encryption
Detailed Explanation
Encryption is primarily a
security and cryptography operation rather than a data-structure operation. Data structures organize and manage data, with operations such as insertion, deletion, traversal, searching, updating, and sorting. Encryption transforms readable data, called
plaintext, into protected data called
ciphertext using an encryption algorithm and key. Although encrypted information can certainly be stored inside data structures, encryption itself is not a fundamental operation of those structures.