In data security, an attack on the security of a computer system, undertaken to test the effectiveness of the security and to highlight any areas of weakness.
在数据保密学中, 对一个计算机系统的安全性的攻击, 用以测试安全的有效性及暴露弱点。
Legal effectiveness or validity.
效力法律上的效力或者有效
Lacking vigor, force, or effectiveness; inadequate.
缺乏活力、力量或效力的; 不充足的
