安全防范技术是保护国家和人民生命财产的重要手段，在预防事故、破获犯罪中起到了重要作用。
The safety defending technique is an important means of protecting country and people's life and possessions, and has important effect in the midst of preventing accident and uncovering crime.
入侵检测系统是保护网络系统安全的关键技术和重要手段，是网络安全领域的研究热点。
Intrusion detection system is the key technologies to protect network systems security and is important way of network security, being a hot area of research and development.
作为信息隐藏技术的一个主要分支，数字水印技术已逐渐成为保护数字产品版权的重要手段，得到了广泛的研究和应用。
As a main part of information hiding techniques, digital watermarking has gradually become the primary method of copyright protection of the digital work, it has been widely studied and applied.
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