Module rotation 

Key rotation utilities for secure key management.

Provides:

• Key versioning and rotation scheduling
• Encrypted key storage and backup
• Key derivation for re-encryption
• Key revocation tracking

Structs

EncryptedKey

Encrypted key storage format.

EncryptionKeyRing

Encryption key ring for managing content encryption keys.

KeyVersion

Key version metadata.

ReEncryptor

Re-encryption helper for rotating content encryption.

RotationPolicy

Key rotation policy.

SigningKeyRing

Signing key ring for managing multiple key versions.

Enums

RotationError

Key rotation error.