Mixing
轨迹
在数学中，轨迹指的是含有某种性质的所有点的集合。它是一种几何形状。
常见的轨迹：
直线：到平面内两点的距离相等的所有点的集合；
圆：到平面内某一点（圆心）距离相等的所有点的集合；
椭圆：到平面内两点（焦点）的距离之和相等的所有点的集合；
双曲线：到平面内两点的距离之差相等的所有点的集合；
抛物线：平面内到一定点和到一条不过此点的定直线（准线）的距离相等的点的集合。
参见
- 焦点
Information security
This article is part of a series on Information security Related security categories Internet security Cyberwarfare Computer security Mobile security Network security Threats Computer crime Vulnerability Eavesdropping Malware Spyware Ransomware Trojans Viruses Worms Rootkits Bootkits Keyloggers Screen scrapers Exploits Backdoors Logic bombs Payloads Denial of service Defenses Computer access control Application security Antivirus software Secure coding Secure by default Secure by design Secure operating systems Authentication Multi-factor authentication Authorization Data-centric security Encryption Firewall Intrusion detection system Mobile secure gateway Runtime application self-protection (RASP) v t e Information security , sometimes shortened to InfoSec , is the practice of preventing unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction of information. Th...
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