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Classic message exchange based on asymmetric cryptography can protect message content from tampering and authenticate terminal by signing with the private key. Keys are communication endpoint spsila improperly managed keys can result in loss of security during content transmission. Additionally, improperly configured endpoints may also threaten content security of storage. Certainly the security can be enhanced by providing both security key management and terminalpsilas security authentication mechanisms. Those mechanisms can be obtained from trusted PC architecture specified by trusted computing group. So based on the new development of those mechanisms, such as property-based sealing, we adopted some cryptography schemes and initiated a security provably trusted transmission protocol, which not only enhances the content security during transmission, but also ensures content security of storage.