Conventional Defense Technologies
From the perspective of technology, the current cyberspace defense methods fall into three categories: the first category focuses on the protection of information by strengthening the system with such technologies as firewall, encryption and decryption, data authentication, and access control. They offer basic protection for normal network access, legitimate user identification and rights management, and the security of confidential data. The second category includes mainly intrusion detection and other technologies, such as vulnerability detection, data authentication, traffic analysis, and log auditing. They aim to perceive attacks in real time and initiate immediate defenses according to the known features of an attack. This category relies on dynamic monitoring and alarm system enabled by feature scanning, pattern matching, data comprehensive analysis, and other methods to block or eliminate threats. The third category is network spoofing, represented by honeypot and honeynet. Their basic approach is, before any attack is performed, to actively construct special preset monitoring and sensing environments, serving as “traps,” to lure potential attackers to enter for the purpose of carrying out analysis of possible attack moves and gathering information necessary for cracking down on, tracing back, or countering the attacks.
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