METHOD AND DEVICE FOR IDENTIFYING TALKER,申请号JP19960254290-传众专利搜索

METHOD AND DEVICE FOR IDENTIFYING TALKER

申请公布号：JPH10107790(A)

申请号：JP19960254290

申请日期：1996.09.26

申请公布日期：1998.04.24

申请人：

SENSHU GINKOU:KK

发明人：NISHI KEIZO;TSUJIBAYASHI SOICHI

分类号：G06F3/16;G09C1/00;G10L15/00;G10L15/10;G10L17/00;H04L9/32;(IPC1-7):H04L9/32;G10L3/00

主分类号：G06F3/16

摘要：<p>PROBLEM TO BE SOLVED: To discriminate presence of interception by superimposing a specific identification signal on a voice automatic reply signal and checking its echo back time. SOLUTION: A voice signal transmission reception section 19 receives a telephone signal from a processing request party 5 and sends a reply message from a voice automatic reply means 16 to a telephone set of the processing request party 5. A time data generating means 17 generates time data of year, month, day, hour, minute, second, applies scramble processing to the data by the DES(data encryption standard) system or the like, the resulting data are converted into a voice band different from a voice band of the processing request party 5 via the voice signal transmission reception section 19 and the data are sent automatically at a prescribed interval. Part of the voice signal sent by a reception center 4 is returned again via a receiver of the processing request party 5 according to a characteristic of a public telephone line network 6, then the voice signal transmission reception section 19 separates the returned time data and sends the data to a central processing unit 21. The central processing unit 21 discriminates the presence of wiretapping depending whether or not a delay time of returned time data is proper.</p>