Research Article
An Efficient Anonymous Authentication Scheme for Mobile Pay-TV Systems
Table 2
Notations of entities and parameters.
| Entities | Description | Parameters | Description |
| HES | Head end system | S | The server | MS | Mobile set | U | The user | SAS | Subscriber authorization system | ID | Identity of the user | SMS | Subscriber management system | PW | Password of the user | CW | Control word | b | Random number | CAS | Conditional access system | T | Timestamp | ECM | Entitlement control message | | Specified maximum time difference | EMM | Entitlement management message | N | User registeration number | DBS | Data base server | | Token for issue phase | MUX | Multiplexer | | Token for subscription phase | DEMUX | Demultiplexer | | Token for hand-off phase | TX | Transmitter | h( ) | One-way hash function | RX | Receiving module | x | Secret key of DBS | DVB | Digital video broadcast | | The adversary |
|
|