| 摘要 |
PROBLEM TO BE SOLVED: To provide a super secure migratable key by the TCPA (trusted computing platform alliance). SOLUTION: A method for providing security by using a secure chip, includes steps of: creating a migratable key blobe using a first random number, where the migratable key blobe contains a key; wrapping the migratable key blobe with a public key of the key's parent key; encrypting the first random number with a pass phrase for a user of the key; storing the encrypted first random number; and migrating the migratable key blobe from a computer to itself. If the public key of the secure chip is stolen, the thief can only unwrap keys which are ancestors of the key in the migratable key blobe. To obtain the key in the migratable key blobe, the random number used to create it is required. However, the pass phrase of the user is required to decrypt it. This increases the security of the key stored in the migratable key blobe and its slave keys. COPYRIGHT: (C)2003,JPO
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