Which of the following is best provided by symmetric cryptography?

The correct answer is A. Confidentiality. Symmetric cryptography uses a single shared secret key for both encryption and decryption, making it excellent for providing confidentiality - only parties with the key can read the data. It does not provide non-repudiation (that requires asymmetric/public-key cryptography, since

Submitted by takeshi77· Apr 18, 2026Cryptography

Question

Options

AConfidentiality
BIntegrity
CAvailability
DNon-repudiation

How the community answered

(46 responses)

A
91% (42)
B
4% (2)
C
2% (1)
D
2% (1)

Explanation

Symmetric cryptography uses a single shared secret key for both encryption and decryption, making it excellent for providing confidentiality - only parties with the key can read the data. It does not provide non-repudiation (that requires asymmetric/public-key cryptography, since both parties share the same key and either could have created the message). Integrity is typically provided by hashing algorithms. Availability is an operational concern, not a cryptographic one.

Topics

#Symmetric cryptography#Confidentiality#Cryptographic principles#CIA triad

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