公开(公告)号：WO1987000377A1

公开(公告)日：1987-01-15

申请号：PCT/US1986001364

申请日：1986-06-26

Applicant: CODART COMMUNICATIONS, INC.

Inventor： CODART COMMUNICATIONS, INC. ,  MAISEL, Douglas, Andrew ,  McREYNOLDS, John, Frederick ,  WEISMAN, Joe ,  CARLSON, Charles, Edward

IPC: H04M01/70

CPC classification number: H04K1/06 ,  H04L9/0662 ,  H04L9/0822 ,  H04L2209/60

Abstract: A novel time-element scrambling system and the component parts thereof for communication over a non-secure communication link (40, 80) such as a telephone line. The scrambling and unscrambling operations are specified by a scrambling code which is exchanged by the two apparatuses (10, 10) at each end of the communication link (40, 80) in an encrypted form (using a public-key code) when the communication link (40, 80) is first established. Thereafter, each apparatus (10) uses the scrambling code to scramble its communications with the other apparatus (10). The generation of these two codes and their exchange by the two apparatuses (10, 10) is transparent to the users. The manner in which the codes are generated guarantees that the next code that will be generated may not be predicted by examining the apparatus (10) in question at any time substantially in advance of the time at which the communication link (40, 80) is established or afterward.

Abstract translation: 一种新颖的时间元扰乱系统及其组成部分，用于通过诸如电话线路的非安全通信链路（40,80）进行通信。 扰频和解扰操作由通信链路（40,80）的每一端的两个设备（10,10）以加密形式（使用公开密钥码）交换的扰码指定，当通信 链接（40,80）首先建立。 此后，每个装置（10）使用扰码来加密与其他装置（10）的通信。 这两个代码的产生及其由两个装置（10,10）的交换对于用户是透明的。 产生代码的方式保证通过在基本上提前通信链路（40,80）为时间的时间的任何时间检查所讨论的设备（10），不能预测将生成的下一个代码 建立或以后。