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Cryptology Academy · Lesson

Key Lifecycle: Generate, Store, Rotate, Destroy

Define each phase of the cryptographic key lifecycle and its risks.

The Cryptographic Key Lifecycle

Every key passes through phases: generation → storage → distribution → use → rotation → archival → destruction. Failure at any phase can compromise all data protected by that key.

Phase 1: Key Generation

Keys must be generated from a cryptographically secure random source (CSPRNG). Key length must match algorithm requirements: AES-256, RSA-4096, ECDSA P-256, etc. Never derive keys from low-entropy sources.

All lessons in this course

  1. Key Lifecycle: Generate, Store, Rotate, Destroy
  2. HSM Architecture & PKCS#11 Interface
  3. AWS KMS, GCP Cloud KMS & Azure Key Vault
  4. Key Escrow, Backup & Recovery Procedures
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