Which of the following is NOT a true statement regarding the implementaton of the 3DES modes?

The correct answer is A. DES-EEE1 uses one key. There is no DES mode call DES-EEE1. It does not exist. The following are the correct modes for triple-DES (3DES): DES-EEE3 uses three keys for encryption and the data is encrypted, encrypted, encrypted; DES- EDE3 uses three keys and encrypts, decrypts and encrypts data…

Submitted by noor.lb· Apr 18, 2026Cryptography

Question

Options

ADES-EEE1 uses one key
BDES-EEE2 uses two keys
CDES-EEE3 uses three keys
DDES-EDE2 uses two keys

How the community answered

(17 responses)

A
76% (13)
B
6% (1)
C
6% (1)
D
12% (2)

Explanation

There is no DES mode call DES-EEE1. It does not exist. The following are the correct modes for triple-DES (3DES): DES-EEE3 uses three keys for encryption and the data is encrypted, encrypted, encrypted; DES- EDE3 uses three keys and encrypts, decrypts and encrypts data. DES-EEE2 and DES-EDE2 are the same as the previous modes, but the first and third operations use the same key.

Topics

#3DES#Symmetric Key Cryptography#Cryptographic Modes of Operation#Keying Options

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