首先在分析嵌入式实时数据库安全要求的基础上，给出了一个三层安全控制模型。
This passage bulids a secure control model with three layers on the ERTDB security requirements firstly, and then proposes a secure optimistic concurrency control strategy.
本文对SSL、SET两个电子商务安全协议作一比较，并针对不同的安全需要，构造一个分级安全控制模型，较好地改进了SET协议。
This article compares SSL with SET protocol, and constructs a hierarchical safety control model to suit for different safety requirements, this model will improve SET protocol.
对于一个模型，您可能会希望以技术为基础构建安全策略和控制。
For one model, you may wish to have security policies and controls built upon the foundation of technologies.
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