发明名称 |
Show-thru prevention and user authentication of uplink bursts without overhead |
摘要 |
<p>A method and apparatus (100) for authenticating information transmitted to a receiver is presented. An information block is encoded (220) to form a raw codeword. A secret cover sequence S is then generated (122) using a hashing variable (124) and a secret key (126). The secret cover sequence is applied (128) through a reversible function to the raw codeword to form a covered codeword. The covered codeword is transmitted and received (130) at a receiver. At the receiver, a secret cover sequence R is generated (150) using a hashing variable (152) and a secret key (154). The secret cover sequence R is applied (156) through a reversible function to the raw codeword to form an uncovered codeword. The uncovered codeword is decoded (158), and if too many errors are reported, the data is discarded (160). <IMAGE></p> |
申请公布号 |
EP1026852(A2) |
申请公布日期 |
2000.08.09 |
申请号 |
EP20000101777 |
申请日期 |
2000.01.28 |
申请人 |
TRW INC. |
发明人 |
CASO, GREGORY S.;WRIGHT, DAVID A. |
分类号 |
G09C1/00;H04L1/00;H04L9/20;H04L9/32;(IPC1-7):H04L9/32 |
主分类号 |
G09C1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|