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Block Cipher

What is Block Cipher?

A symmetric encryption algorithm that operates on fixed-size blocks of data. Common block ciphers include AES (Advanced Encryption Standard) and 3DES.

Information Security

Frameworks that govern block cipher

ISO 27001:2022View framework →NIST SP 800-53 Rev 5View framework →

What the standards actually require on block cipher

Requirements naming block cipher across 2 standards, quoted from the control text.

Commercial National Security Algorithm Suite (CNSA) 2.01 control

The Advanced Encryption Standard (FIPS 197) is the symmetric block cipher for information protection, used with 256-bit keys to protect information up to TOP SECRET: CNSSP 15 Annex B lists it among the general purpose algorithms, as the 2022 advisory did.

commercial-national-security-algorithm-suite-cnsa-2-0::ALG-AES · ALG-AES AES-256 for symmetric encryption at all classification levels →
ITU-T X.805 - Security Architecture for End-to-End Communications1 control

Security Dimensions 4 and 5 per X.805 Clauses 6.4 and 6.5 are closely related: (1) Data Confidentiality (Dim 4) protects data from unauthorized disclosure - so that anyone without authorization is unable to make sense of the content.

X805-Dim4-5-Data-Confidentiality-Communication-Security-Encryption-Information-Flow-Protection · ITU-T X.805 Security Dimensions 4-5 - Data Confidentiality + Communication Security + Encryption At-Rest + In-Transit + In-Use + Information Flow Protection + Steered Communication + Anti-Tap + Anti-Eavesdrop + Post-Quantum Cryptography →

Questions people ask about block cipher

What is Block Cipher?
A symmetric encryption algorithm that operates on fixed-size blocks of data. Common block ciphers include AES (Advanced Encryption Standard) and 3DES.
Why is Block Cipher important for compliance?
Block Cipher is a key concept in Information Security. Understanding block cipher helps organizations meet regulatory requirements, reduce risk, and demonstrate due diligence during audits. Our compliance platform maps 1,016 frameworks with 316K cross-framework control mappings.
Which compliance frameworks address Block Cipher?
Block Cipher appears in the requirement text of Commercial National Security Algorithm Suite (CNSA) 2.0, ITU-T X.805 - Security Architecture for End-to-End Communications. Across these standards we have identified 2 controls that name it directly, each linked to the control text on the compliance platform.
Where can I learn more about Block Cipher?
Explore our compliance framework pages to see how block cipher applies across different standards and regulations. Our implementation guides provide step-by-step guidance, and the compliance platform offers AI-powered analysis of how this concept maps across 1,016 frameworks.

See how Block Cipher applies across compliance frameworks

Our platform maps 1,016 frameworks with 316K cross-framework control mappings. Explore how this concept is addressed across standards.

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Written and maintained by Gerard Blokdyk, The Art of Service.