CyberGuard dictionary / Cryptography
Encryption
Transformation of readable data into ciphertext using a cryptographic key.
In simple terms
Encryption makes information unreadable to someone who does not have the right key.
Technical explanation
Encryption algorithms and key management work together; protection depends on implementation and how keys are stored and used.
Confidentiality depends on strong algorithms, sound key handling, and the right coverage; encryption cannot protect data after an authorized application decrypts it for a compromised user. Key loss can also make data unavailable.
Examples in practice
A laptop encrypts its drive so a thief cannot readily read the files.
The stolen laptop's encrypted drive protects files while powered off, but a stolen unlocked session could still expose them. The business also enforces screen locking and remote account revocation.
Why it matters
Encryption helps protect confidentiality during storage and transfer.
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Sources and further reading
Published 2026-10-15 · Last updated 2026-10-15 · CyberGuard editorial content. Source links provide context; they do not imply endorsement.