METHOD TO PROTECT RECORDED MULTIMEDIA CONTENT,申请号RU20130151260-传众专利搜索

METHOD TO PROTECT RECORDED MULTIMEDIA CONTENT

申请公布号：RU2547228(C1)

申请号：RU20130151260

申请日期：2012.04.12

申请公布日期：2015.04.10

申请人：

VIAKSESS

发明人：BUAVEN MAT'E;DJUBREJK ZHIL'

分类号：H04N21/433

主分类号：H04N21/433

摘要：FIELD: information technologies.SUBSTANCE: in the method with the help of a network head device they perform, on a channel, broadcast (162) of scrambled multimedia content and ECM messages (entitlement control messages), which contain cryptograms CWof control words CW, providing for unscrambling of the appropriate cryptoperiod of scrambled multimedia content, the specified scrambled multimedia content and ECM messages are received with the help of one of recording devices, and the cryptogram CWis decoded (184) that is contained in the ECM message received with a subscription key K, the scrambled multimedia content is protected against reading, using the key KH, by means of coding (186) of decoded control words by means of the key KHfor generation of cryptograms CW.EFFECT: increased extent of protection of recorded multimedia content.16 cl, 3 dwg