这类恶意软件能够对计算机操作系统和嵌入式设备进行隐蔽探测，记录网络内部结构、口令密码等信息。
This kind of malicious software can hide the computer operating system and embedded devices, recording the internal structure of the network, password password and other information.
为防止电子现金重复花费和数据库记录无限制的膨胀问题，改进了现有的利用椭圆曲线密码系统构造的离线电子现金系统。
To prevent e-cash from double-spending and unlimited increase in the records of databases, an improved offline e-cash system based on elliptic curve cryptography was proposed.
该系统可以实现电话话单的记录、话费的统计与结算、用户话机权限控制、密码电话等功能。
The record and statistic of telephone charging, the control of user grade and cipher code telephone are developed deveploped in this system.
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