Remember AES-GCM
Full name: Advanced Encryption Standard in Galois/Counter Mode
Memory aid: AES encrypts while GCM guards the message.
Nonce reuse with the same key can critically undermine GCM security.
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-GCM — Advanced Encryption Standard in Galois/Counter Mode
Combines AES encryption with authenticated-encryption processing in GCM.
Why learn AES-GCM — Advanced Encryption Standard in Galois/Counter Mode?
Combines AES encryption with authenticated-encryption processing in GCM.
Where it came from
Nonce reuse with the same key can critically undermine GCM security.
- Memory aid (a learning cue, not the expansion): AES encrypts while GCM guards the message.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand AES-GCM: Advanced Encryption Standard in Galois/Counter Mode.
- Recall this memory aid: AES encrypts while GCM guards the message.
- Explain the practical use: Combines AES encryption with authenticated-encryption processing in GCM.
- Explain this distinction: Nonce reuse with the same key can critically undermine GCM security.
- Identify AES-GCM in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IETF RFC 5116 (www.rfc-editor.org)