安全无损的广播信道的可达信源允许区域

Achievable Source Admission Region for Secure Lossless Broadcast Channel

从信息理论安全的角度研究双信源在广播信道下保密传输的问题,其中每一个接收用户的信息对于其他用户来说都是保密的,并用疑义度来度量保密水平。采用分离信源信道编码策略,并结合double binning和速率划分技术,得到了双信源在广播信道下能够保密传输的信源允许区域的内界。该内界是在保证可靠性传输可达的基础上得到的,并且它扩展了以往结果,使它们成为该内界的一个特例。

The problem of dual-source secure transmission over broadcast channel is studied using information security theory,in which the information of each receiver is unknown to the source intended for other receivers and the secure level is measured by the equivocation rate at the eavesdropping receiver.Applying separated source-channel coding scheme and combining with double binning and rate splitting technologies,an inner bound of source admission region is obtained based on the achievable and reliable transmission guaranteed,thus it can generalize existing results as a special case.in the inner bound.