The DES algorithm is an example of what type of cryptography?

The correct answer is A. Secret Key. DES (Data Encryption Standard) is a symmetric-key block cipher, meaning it uses the same single key for both encryption and decryption. This is known as Secret Key (or symmetric) cryptography. Asymmetric Key (C) and Public Key (D) cryptography use a mathematically linked key…

Submitted by zhang_li· Apr 18, 2026Cryptography

Question

Options

ASecret Key
BTwo-key
CAsymmetric Key
DPublic Key

How the community answered

(29 responses)

A
97% (28)
C
3% (1)

Explanation

DES (Data Encryption Standard) is a symmetric-key block cipher, meaning it uses the same single key for both encryption and decryption. This is known as Secret Key (or symmetric) cryptography. Asymmetric Key (C) and Public Key (D) cryptography use a mathematically linked key pair (public and private), which DES does not. 'Two-key' (B) is not a standard cryptographic classification. DES operates on 64-bit blocks with a 56-bit key and, while now considered insecure, it was the first widely adopted standard for secret key encryption.

Topics

#DES#Symmetric Cryptography#Secret Key Cryptography#Cryptographic Algorithms

Community Discussion

No community discussion yet for this question.

Full SSCP Practice