Security+ glossary
Plain-language definitions of key CompTIA Security+ (SY0-701) terms, organized by exam domain. New terms are added regularly.
Core concepts
Cryptography
Symmetric encryption
Asymmetric encryption
Hashing
Salt
Hash-based message authentication code (HMAC)
Digital signature
Diffie-Hellman key exchange
Digital certificate
Trusted platform module (TPM)
Hardware security module (HSM)
Secure enclave
Key escrow
Online certificate status protocol (OCSP)
Certificate pinning
Downgrade attack
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