Security technologies provide a high quality and perfect security operation system for multi-play services.

安全保障技术为多重业务提供高质量、完善的安全运营机制；

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Realize the perfect security and authority system through function division, role assignment and user management.

通过功能划分、角色分配、用户管理，实现完善的安全和权限体系。

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It is shown that there is still an asymptotic perfect security of quantum key distribution under this attack strategy.

理论计算证明了量子密钥分配协议在这种攻击策略下仍具有足够的安全性。

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Despite these burgeoning countermeasures there is, of course, no such thing as perfect security.

ECONOMIST: Forensic computing studies the anatomy of computer crime

The technique exploits the arcana of quantum mechanics to let two computers swap a cryptographic key (and thus the means to decode a message) with perfect security.

ECONOMIST: Optical communications

All the search engines follow these robot directives, which, while not a perfect security solution, limit the entry points used by the bots and spiders that index the Web.

FORBES: Google Me Not