The key management in the version 1.2 specification has an synchronization problem that attackers can access a key using the old authorization data which has been modified.And different keys in TPM should have different authorization data.The authorization protocols are complicated

and some of them have the same functions.The paper proposes a new method for the key authorization data management.Some entities in TPM may have the same authorization data.Therefore

the management of authorization data becomes less complicated.The synchronization problem can be solved by the authorization data list.which improves the reliablity and security of the key management in TPM.