Then the thesis put forward to a kind of security protocol based on trusted third party and a kind of lightweight IP layer security mechanism, and analysed them in details.
然后提出了一种基于可信第三方的安全协议以及一种轻量级IP层的安全机制，对它们进行了详细的分析。
The protocol can be implemented without the participation of the third party and its security was based on additive homomorphic public key cryptosystem.
协议的执行过程中不需要第三方的参与，协议的安全性基于所采用的同态公钥加密算法。
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