Key management is a critical technology of cryptography system.

密钥管理是密码系统中的关键技术。

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This article first analyzes the security of computer network, introduces basic technology that guarantee the security and emphasizes that cryptography is the core technology.

本文第一章分析计算机网络的安全性，介绍保障计算机网络安全的基本技术，指出密码技术是网络安全技术的核心。

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Cryptography is an important technology of information security. It can guarantees information's confidentiality, integrality and authentication.

密码学作为信息安全的重要技术，能有效保障信息的机密性、完整性和鉴别。

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Jun, Vice President of technology at Cryptography Research, said that once online he was able to access a database showing what those he knew had purchased at various Nike stores.

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