To increase the security and the expansionary of the system, it uses SIP as a core protocol.
为增加系统安全性和可扩展性，采用下一代互联网络的核心协议—SIP作为控制信令协议。
But the design ideas of SIP, and the unreliability of the bear network, bring the great potential security problems on a large scale application of SIP.
但SIP的设计理念，以及其承载网络的不可靠性，为SIP的大规模应用带来了极大的安全隐患。
However, SIP is not mature enough. It's important and necessary for us to study its implementation, security and efficiency.
然而，SIP协议还不完全成熟，有必要对其运行效率、安全性和功能实现等方面作一些实际的研究和探索。
The SIP shall make out Intellectual Property Rights Protection Norms for SIP service outsourcing and Local Regulations for Personal Information Security Protection.
制定出台园区服务外包知识产权保护规范、个人信息安全保护地方法规。
A new negotiation mechanism for the selection of security protocols among SIP entities was put forward, and moreover the corresponding security analysis was provided.
提出了一种新的安全协商机制用于在SIP实体之间进行安全协议的选择，并给出了相应的安全性分析。
Another one lies on that we take the Softswitch billing security issues into account, proposing a SIP-based Softswitch billing security mechanism.
另一点在于考虑了软交换计费安全的问题，提出了一个基于SIP的软交换计费安全机制。
Another one lies on that we take the Softswitch billing security issues into account, proposing a SIP-based Softswitch billing security mechanism.
另一点在于考虑了软交换计费安全的问题，提出了一个基于SIP的软交换计费安全机制。
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