Remember AES-CBC
Full name: Advanced Encryption Standard in Cipher Block Chaining mode
Memory aid: Each Cipher Block Chains to the prior block.
CBC encryption alone does not authenticate ciphertext.
Study area: Cryptography & trust · Batch 8
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
AES-CBC — Advanced Encryption Standard in Cipher Block Chaining mode
Encrypts AES blocks using a chaining construction.
Why learn AES-CBC — Advanced Encryption Standard in Cipher Block Chaining mode?
Encrypts AES blocks using a chaining construction.
Where it came from
CBC encryption alone does not authenticate ciphertext.
- Memory aid (a learning cue, not the expansion): Each Cipher Block Chains to the prior block.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand AES-CBC: Advanced Encryption Standard in Cipher Block Chaining mode.
- Recall this memory aid: Each Cipher Block Chains to the prior block.
- Explain the practical use: Encrypts AES blocks using a chaining construction.
- Explain this distinction: CBC encryption alone does not authenticate ciphertext.
- Identify AES-CBC in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IETF RFC 3602 (www.rfc-editor.org)