Which of the following is NOT an asymmetric key algorithm?

The correct answer is D. Data Encryption System (DES). Data Encryption Standard (DES) is a symmetric key algorithm. Originally developed by IBM, under project name Lucifer, this 128-bit algorithm was accepted by the NIST in 1974, but the key size was reduced to 56 bits, plus 8 bits for parity. It somehow became a national…

Submitted by thandi_sa· Apr 18, 2026Cryptography

Question

Options

ARSA
BElliptic Curve Cryptosystem (ECC)
CEl Gamal
DData Encryption System (DES)

How the community answered

(57 responses)

A
2% (1)
B
2% (1)
C
4% (2)
D
93% (53)

Explanation

Data Encryption Standard (DES) is a symmetric key algorithm. Originally developed by IBM, under project name Lucifer, this 128-bit algorithm was accepted by the NIST in 1974, but the key size was reduced to 56 bits, plus 8 bits for parity. It somehow became a national cryptographic standard in 1977, and an American National Standard Institute (ANSI) standard in 1978. DES was later replaced by the Advanced Encryption Standard (AES) by the NIST. All other options are asymmetric algorithms.

Topics

#Cryptography#Asymmetric Algorithms#Symmetric Algorithms#DES

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