Remember SHA-256
Full name: Secure Hash Algorithm with 256-bit output
Memory aid: 256 is the fingerprint length in bits.
A plain hash does not authenticate a sender.
Study area: Cryptography & trust · Batch 3
Relevant study for: CompTIA Security+ SY0-701 · ISC2 CISSP 2024 outline · ISC2 SSCP · CompTIA SecurityX · Cybersecurity Architect SC-100 · ISC2 CCSP · Security, Compliance, and Identity Fundamentals SC-900
Practice with exam flashcards →Cybersecurity & Identity / Knowledge library
SHA-256 — Secure Hash Algorithm with 256-bit output
Produces a 256-bit digest in the SHA-2 family.
Why learn SHA-256 — Secure Hash Algorithm with 256-bit output?
Produces a 256-bit digest in the SHA-2 family.
Where it came from
A plain hash does not authenticate a sender.
- Memory aid (a learning cue, not the expansion): 256 is the fingerprint length in bits.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand SHA-256: Secure Hash Algorithm with 256-bit output.
- Recall this memory aid: 256 is the fingerprint length in bits.
- Explain the practical use: Produces a 256-bit digest in the SHA-2 family.
- Explain this distinction: A plain hash does not authenticate a sender.
- Identify SHA-256 in a device specification, architecture diagram, or system inventory.
Documentation and sources
- NIST cybersecurity glossary (csrc.nist.gov)