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1. 发明专利

IL186570A NATIVE SCRAMBLING SYSTEM 未知
公开(公告)号：IL186570A
公开(公告)日：2012-02-29
申请号：IL18657007
申请日：2007-10-10
申请人： SHEN-ORR CHAIM , NDS LTD , LEVY YAAKOV , BELENKY YAACOV , HIBSHOOSH ELIPHAZ
发明人： SHEN-ORR CHAIM , LEVY YAAKOV , BELENKY YAACOV , HIBSHOOSH ELIPHAZ
摘要： A system (10) for scrambling / descrambling packets (20,22) of a stream of content (16) is disclosed, each of the packets (20,22) having a must stay clear (MSC) section (24) which is always kept in the clear, the system (10) comprising: an input handler (12) including: a receiving module (34) to receive the stream (16); and a mask module (46) to create, for each of the packets (20,22), a data mask (48) which includes all data of the MSC section except for at least one bit of data of the MSC section; and a scrambling / descrambling device (14) operationally associated with the input handler (12), the scrambling / descrambling device (14) including: a receiving module (50) to receive the data mask (48) for each of the packets (20,22) from the input handler (12); and an Initial Value module (52) to determine an Initial Value (70) for each of the packets (20,22) as a function of the data mask (48) of one of the packets (20,22) being processed such that the Initial Value (70) is not a function of the at least one bit of data of the MSC section (24) of the one packet (20,22) being processed, the scrambling /descrambling device (14) being adapted to at least one of scramble and descramble the packets (20,22) based on the Initial Value (70) and a Control Word (62).

2. 发明专利

IL174614A METHOD OF ENFORCING USE OF CERTIFICATE REVOCATION LISTS 未知
公开(公告)号：IL174614A
公开(公告)日：2013-03-24
申请号：IL17461406
申请日：2006-03-29
申请人： LEVY YAAKOV , SHEN-ORR CHAIM , NDS LTD , BELENKY YAACOV
发明人： LEVY YAAKOV , SHEN-ORR CHAIM , BELENKY YAACOV
IPC分类号： G06F21/31
摘要： A method for enforcing use of certificate revocation lists in validating certificates, the lists being associated with a series of list generation indices such that each list is assigned one index which advances according to a time of generation of the list, the lists and the indices being cryptographically signed, the method including receiving one of the lists and an associated index as an identifier of the one list, checking the certificates against the list, associating each of the certificates, which have been checked against the list, with the index, receiving an enforcement generation index (EGI) associated with a latest list in use, storing the EGI as a last known EGI, and refusing performance of an action associated with a certificate if the one index of the one certificate is earlier in the series than the last known EGI. Related apparatus and methods are also included.

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