Key Rotation
Definition
Key rotation replaces cryptographic keys on a scheduled or event-driven basis with new keys.
Rotation limits the usage duration of a key and can reduce the impact of a compromise. Frequency and procedures should fit the cryptoperiod and risk model; old data must still be decryptable correctly.
Simply explained
How to regularly replace a security key without losing access to already encrypted archives.
Why it matters in practice
Relevant for API secrets, KMS, signatures, and encryption of business-critical systems.
Example from business
A service rotates an encryption key after a defined cryptoperiod and retains previous keys in a controlled manner only for necessary decryption.
Limits and pitfalls
- Blindly rotating too often; not updating dependencies; deleting old keys while data still needs them; rotation without a compromise process.
Origin & history
NIST SP 800-57 describes cryptoperiods and lifecycle management of cryptographic keys as part of good key management practice.
Use in mid-sized companies
- Possible applications: KMS keys, signature keys, API credentials, and secrets with documented lifecycle.
Frequently asked questions
Does every key need to be rotated equally often?
No, cryptoperiod and risk differ. Is rotation after a leak sufficient? Additionally, affected accesses and data must be assessed.
Sources
- NIST SP 800-57 Part 1 Rev. 5 · NIST SP 800-57 Part 1 Rev. 5
Sources checked on 10.10.2026.
Editorially reviewed on: