摘要
为杜绝输入被别人偷窥 ,防止电话被搭线窃听及重放攻击 ,特研制了一种双音频声音密码拨号器 ,来代替手工拨号易被窃之弊病。使用方法为低功耗单片机控制双音双频设计 。
In order to put an end to be stolen for inputs and avoid interception of phone call through the way of other phone line,this paper develops a dualtone multi-frequency voice cipher dial set for instead of manual dialing.The way that the low power dissipation microcomputer control controls DTMF electric circuit is used,and is successful in application.
出处
《电脑开发与应用》
2003年第7期14-15,共2页
Computer Development & Applications
基金
北京某公司委托并资助
