从一个实用系统出发，采用形式化的证明方法，分析了电子资金转帐系统中安全协议的保密性和可鉴别性。
From an application system, this paper analyzes the privacy and authenticity of a security protocol in the electronic fund transfer system with a formal proof method.
事实证明，串空间模型是分析安全协议的一种实用、直观和严格的形式化方法。
In facts SSM is a practical, intuitive and strict formal method for security protocol analysis.
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.
密码协议必须满足安全属性的需求，对密码协议进行形式化规范需要证明其满足该属性。
The cryptographic protocol should always satisfy security properties, so the formal specification should give the corresponding proof method.
然后对系统结构化要求进行了形式化的描述，并证明通过提出的结构化方法可以获得安全的进程环境。
Then we formalized structural requirements of process environment, and proved that a secure process environment can be available by structured method proposed.
通过建立协议的理想化模型，利用BAN逻辑形式化分析该协议，在理论上证明其安全性。
After setting up the idealized protocol model, a process of formal analysis of this protocol is presented and the security is proved theoretically by using the BAN logic.
通过建立协议的理想化模型，利用BAN逻辑形式化分析该协议，在理论上证明其安全性。
After setting up the idealized protocol model, a process of formal analysis of this protocol is presented and the security is proved theoretically by using the BAN logic.
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