基于声信道的隐蔽信息传输关键技术  

The Transmission Technology of Covert Information Based on Acoustic Channel

作　　者：丁雪洁[1] 李彬[2,3] 韦迪[1,4] 张萌[1] 孙德刚[1] 

机构地区：[1]中国科学院信息工程研究所,北京100093 [2]北京交通大学,北京100044 [3]国家保密科技测评中心,北京100044 [4]中国科学院大学,北京100049

出　　处：《信息安全研究》2016年第2期131-136,共6页Journal of Information Security Research

基　　金：国家自然科学基金项目(61501458)

摘　　要：介绍一种利用声信道进行隐蔽信息传输的技术,该技术作为一种隐蔽通信技术,已经成为物理安全研究领域关注的重点.声信道信息隐蔽传输技术是利用声音实现电脑与电脑或智能手机等终端设备之间近距离点对点或一对多的信息隐蔽传输的一套全新技术方案.通信时,数据发送端将隐蔽数据转换为声波信号（15~20kHz）,然后通过扬声器输出发送出来,数据接收端通过录音设备接收发送的播音数据,然后将播音数据解码为目标数据.相对于其他近距离通信方式,声信道信息隐蔽传输技术不仅具有实现简单、成本低的特点,只要发送端和接收端有播音和录音设备即可实现,另外还可以在第三方无法察觉秘密信息存在的情况下,在隐蔽的声信道中实现信息的秘密传输.In this paper we introduce a transmission technology of covert information using acoustic channel. As one of key covert communication technologies, it has been attracting widespread attention and interest in the study field of physical security. This technology can achieve the transmission of hidden information between smart terminal devices, such as smart phones and personal computers. The secret data was transformed into a sound wave （frequency ranging from 15 kHz to 20 kHz） and then sent out by speakers from transmitting end. At the receiving end, the sound wave was recorded by microphones and decoded. Compared with other close range communication modes .this technology has obvious advantage 〉 not only can be implemented simply with low cost as long as the transmitter and the receiver are broadcast and recording equipment can be achieved. but also assure that the covert transmission of information in the hidden voice channel without detecting the existence of secret information by the third party.

关 键 词：声信道 物理隔离 智能终端设备 隐蔽信息 信息传输 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]