文章描述了安全多播系统中的密码api的设计与实现，并讨论了密码算法实现中的优化问题。
This paper describes the design and implementation of the cryptographic API in Secure Multicast System and discusses the optimization of the cryptographic algorithms in implementation.
安全多播系统对安全的需求比较复杂，包括身份认证、数据认证、数据完整性、密钥更新等多方面需求。
The security request of security multicast is different, including identity authentication, data authentication, data integrality, key updating etc.
在原型系统方面，研究并实现了一个新的基于代理服务器的覆盖多播系统—服务可定制的覆盖多播系统(SCOMS)。
In prototype, a new proxy-based overlay multicast system called Service Customizable overlay multicast system (SCOMS) is studied and implemented.
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