KEY MANAGEMENT METHOD, SECURITY CHIP, SERVICE SERVER AND INFORMATION SYSTEM

A key management method includes: sending, by a security chip of a computer device, a request for obtaining a service key to a key management service; receiving, by the security chip, a service key ciphertext from the key management service, wherein the service key ciphertext is obtained by encrypting the service key by the key management service based on a migration key of the security chip; decrypting, by the security chip, the service key ciphertext based on the migration key to obtain the service key; storing, by the security chip, the service key in the security chip; and providing, by the security chip, the service key to an application program of the computer device when the application program needs to encrypt data based on the service key.