Key lifecycle management addresses the risk of key leakage by implementing strict controls and processes across the entire lifespan of cryptographic keys, from generation to retirement. This includes secure key generation, storage, distribution, rotation, revocation, and deletion to minimize exposure and unauthorized access.
Secure Key Generation: Keys are created using cryptographically secure random number generators to ensure unpredictability. For example, using hardware security modules (HSMs) to generate keys ensures protection against software-based attacks.
Restricted Storage: Keys are stored in secure environments, such as HSMs or encrypted key vaults, to prevent unauthorized access. For instance, Tencent Cloud’s Key Management Service (KMS) stores keys in FIPS 140-2 Level 3-certified HSMs, ensuring tamper-resistant protection.
Controlled Distribution: Keys are shared only with authorized entities through secure channels, such as encrypted communication protocols. Tencent Cloud KMS supports role-based access control (RBAC) to limit who can access or manage keys.
Regular Rotation: Keys are periodically rotated to reduce the impact of potential leakage. For example, rotating encryption keys every 90 days limits the window of exposure if a key is compromised. Tencent Cloud KMS automates key rotation for services like COS (Cloud Object Storage).
Immediate Revocation: If a key is suspected to be leaked, it can be revoked instantly to prevent further use. Tencent Cloud KMS allows manual or automated revocation of compromised keys.
Secure Deletion: Keys are permanently deleted after their lifecycle ends, ensuring they cannot be recovered. Tencent Cloud KMS supports secure key destruction, complying with industry standards.
By enforcing these practices, key lifecycle management mitigates the risk of key leakage and ensures data security. Tencent Cloud’s KMS provides a robust solution for managing cryptographic keys securely.