Key Management Service (KMS)
Definition
A key management service manages cryptographic keys and their authorized usage.
A KMS supports creating, storing, and controlled use of cryptographic keys. Applications can, for example, encrypt data with managed keys or request signatures. Specific functions depend on the service.
Simply explained
Like a managed key center, the service defines which authorized operation may use which key.
Why it matters in practice
Central management makes key accesses and responsibilities more transparent.
Example from business
Hypothetical example: An application may use a key to decrypt a specific data type but may not export it.
Limits and pitfalls
- A KMS does not replace sensible permissions. Careless deletion of a key can make data inaccessible.
Origin & history
Key management arose from the need to securely handle encryption keys throughout their entire lifecycle.
Use in mid-sized companies
- Plan access rights, logging, recovery, and key rotation together.
Frequently asked questions
Is a KMS the same as a password manager?
No, it primarily manages cryptographic keys for applications and services.
Sources
- Key Management Service · AWS: Key Management Service
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