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Encryption
security
Plain-language definition
Plain-language definition
Transforming readable data so only authorized holders of a key can read it.
Why it matters
It protects data confidentiality in storage or transit but does not replace access control.
Technical detail
Encryption applies a cryptographic algorithm and key to plaintext to produce ciphertext, with security depending on the algorithm, keys, mode, and implementation.
Examples
- TLS encrypts account data while it travels between a browser and the API.
Related terms
Sources and review
Reviewed July 12, 2026 by [email protected]. Next review due January 11, 2027.
- Glossary of Key Information Security Terms — National Institute of Standards and Technology Accessed 7/11/2026
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