DYNAMICALLY SHIFTING CONTROL WORD

申请公布号：

WO0191466(A3)

申请号：

WO2001IL00434

申请日期：

2001.05.16

申请公布日期：

2002.04.11

申请人：

NDS LIMITED;PATINKIN, AKIVA;WALD, STEPHANIE;POUPKO, AVRAHAM

发明人：

PATINKIN, AKIVA;WALD, STEPHANIE;POUPKO, AVRAHAM

分类号：

H04N7/16;H04N7/167;H04N21/2343;H04N21/258;H04N21/266;H04N21/418;H04N21/478

主分类号：

H04N7/16

摘要：

A method for generating a plurality of control words, each control word controlling access to an object. The method includes providing a control word packet (CWP), generating a first control word (CW) from the CWP, providing a second CW generation input and producing a second CW based, at least in part, on both of the following the first CW and the second CW generation input. Control word generating apparatus for generating a plurality of control words is also disclosed.