In database security, an information loss effect arising from the use of perturbation techniques in inference control.It is defined as the difference between the expectation of the perturbed statistic and its true value.

• 数据库安全学中，由于在引用控制中使用扰动技术而带来的信息丢失。它定义为受扰动统计量的期望值与实际值之差。