CONTENTS

Policy on Intellectual Property Right (IPR)     ii
RECOMMENDATION  ITU-R  BT.1852     1
Conditional-access systems for digital broadcasting     1
Scope     1
Annex 1  Fundamental principles for the design of conditional-access systems  for digital broadcasting     2
1 Introduction  2
2 References  2
        2.1 Normative references  2
        2.2 Informative references  2
3 Terms, definitions and abbreviations  2
        3.1 Terms and definitions  2
Scrambling in digital broadcasting     2
Descrambling in digital broadcasting     2
Conditional access     2
Conditional-access control     3
Encryption and decryption     3
Point of origination     3
Point of presentation     3
Content     3
Service     3
Service protection     3
        3.2 Abbreviations  3
4 General description of a conditional-access system   4
        4.1 Reference model 4
        4.2 Scrambling  5
        4.3 Access control 5
5 User requirements  5
        5.1 Anti-hacking strength of a cipher for scrambler and descrambler 5
        5.2 Security  5
        5.3 Selection of common or private scrambling algorithm   5
        5.4 Access modes  5
        5.5 Equipment standardization  6
        5.6 Access management 6
        5.7 Avoidance of interruptions to the service  6
6 Entitlement control messages (ECMs) 6
7 Entitlement management messages (EMMs) 6
8 Receiver access control functionality  7
Appendix 1 to Annex 1     8
1 Description of “Roscrypt” system   11
        1.1 Functional and technical features of “Roscrypt”: 11
        1.2 Other: 12
2 Description of “CAS-R” system   12
        2.1 Purpose of the system   12
        2.2 Requirement of CAS-R and its deliberative systems  12
        2.3 Requirement for security module  13
        2.4 A detailed description of the system is provided in the following document 13
3 Description of the “IEC 62455 with DVB systems”  13