A code, as is pertains to cryptography:

The correct answer is C. Deals with linguistic units. In formal cryptography, a 'code' and a 'cipher' are distinct concepts. A code operates at the level of linguistic units - replacing entire words, phrases, or meanings with code groups or code words (e.g., 'Apple' means 'attack at dawn'). A cipher, by contrast, operates at the…

Submitted by neha2k· Apr 18, 2026Cryptography

Question

Options

AIs a generic term for encryption.
BIs specific to substitution ciphers.
CDeals with linguistic units.
DIs specific to transposition ciphers.

How the community answered

(60 responses)

A
3% (2)
B
7% (4)
C
88% (53)
D
2% (1)

Explanation

In formal cryptography, a 'code' and a 'cipher' are distinct concepts. A code operates at the level of linguistic units - replacing entire words, phrases, or meanings with code groups or code words (e.g., 'Apple' means 'attack at dawn'). A cipher, by contrast, operates at the character or bit level using a defined algorithm. Codes are not a generic term for encryption, nor are they specific to substitution or transposition ciphers. Codebooks are required to encode and decode messages, and the secrecy lies in the codebook itself rather than in an algorithmic transformation.

Topics

#Cryptographic Terminology#Codes and Ciphers#Fundamental Cryptography

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