引用数字硬件形式化证明的思想，提出了对保证维护进行形式化描述和验证的思路。
Refered to formal verification for VLSI, a new method to formally describe and verify assurance maintenance is brought forward.
并采用BAN认证逻辑对协议的安全性进行了形式化证明，也对协议的计算复杂性进行了定性分析。
Then the formalized security proof of the protocol using BAN authentication logic, and the qualitative analysis about its computing complexity are given.
通过对模型的形式化证明，模型的应用示例，以及与传统访问控制模型的对比，证实了TTC模型在增强可生存性方面的价值。
The value of TTC for enhancing survivability is attested by formal proving, application demonstration and comparing with traditional access control models.
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