The protection of data stored and processed on a personal computer against unauthorized disclosure or modification, and the protection of the hardware,and storage media against loss,modification or damage.

• 对个人计算机中存储和处理的数据进行保护,以防止非法泄露和修改; 以及对硬件及存储介质的保护,以防止丢失、改动和破坏。