Base on the osi security model , the specific security mechanisms for embedded internet are analyzed , a set of security control protocols named eiscp ( embedded internet security communication protocol ) is developed , which is adapt to the 32bit processor and distributed network construction . 2 . the design of security communication protocol based on hash algorithm and block cipher algorithm suitable for 32bit processor is presented 基于osi安全体系架构,分析了适合为嵌入式internet提供安全服务的安全机制,设计并实现了适合在32位处理器和rtos (实时多任务操作系统)环境下实现的,支持多点访问的嵌入式internet安全通信协议eiscp ( embeddedinternetsecuritycommunicationprotocol ) 。