网络安全是指网络系统的硬件、软件及其系统中的数据受到保护，不受偶然的或者恶意的原因而遭到破坏、更改、泄露，系统连续可靠正常地运行，网络服务不中断。
网络安全从其本质上来讲就是网络上的信息安全。
从广义来说，凡是涉及到网络上信息的保密性、完整性、可用性、真实性和可控性的相关技术和理论都是网络安全的研究领域。
从用户的角度来说，他们希望涉及个人隐私或商业利益的信息受到保护，避免他人利用窃听、冒充、篡改、抵赖等手段侵犯用户的利益。
对于网络运行和管理者，希望对本地网络信息的访问、读写等操作受到保护和控制，避免出现“陷门”、病毒、非法存取、拒绝服务和网络资源非法占用和非法控制等威胁，制止和防御网络黑客的攻击。
网络安全是一门涉及计算机科学、网络技术、通信技术、密码技术、信息安全技术、应用数学、数论、信息论等多种学科的综合性学科。
“没有网络安全就没有国家安全，没有信息化就没有现代化。”
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43.240.159.254文章来源：https://www.toymoban.com/news/detail-738294.html
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