Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and device for controlling access to encrypted data










Image Number 3 for United States Patent #7908491.

The invention concerns a method for controlling access to encrypted data by control words (CW), said control words being received by a security module in control messages (ECM) and returned to a unit operating on (STB) the encrypted data. The method includes the following steps: receiving a first control message (ECM) comprising at least one control word (CW) and a time stamp (TS), receiving a second control message (ECM2) consecutive to the first control message (ECM1), said second message comprising at least one control word (CW) and a time stamp (TS), determining a duration corresponding to the difference between the time stamps (TS) of the two consecutive control messages (ECM1, ECM2), if said duration is less than a predefined duration (CP), incrementing an error counter (CE), and if said duration is not less than said predefined duration, decrementing said error counter (CE), returning the control word (CW) to the operating unit (STB) after a waiting time depending on the value of the error counter (CE).








 
 
  Recently Added Patents
Structure of circuit board and method for fabricating the same
Power conversion device and method for controlling thereof
Thermoforming sheet loading apparatus and method
Cartridge for separating analyte from mixture, comprising dispensing and receiving chambers and insert
Image processing apparatus and image processing method
People engine optimization
Vehicle control apparatus
  Randomly Featured Patents
Natural sedative composition, process for obtaining the same and pharmaceutical formulations thereof
Magnetic disk cartridge
Sonic instrumentation apparatus and method for cement bond logging
Radar
Device for driving and positioning a source holder in an applicator used in radiotherapy
Method of making an implanted resistor, and resistor obtained thereby
OLEDs doped with phosphorescent compounds
Light fixture
Gemstone or ornamental object made of glass
System and method for hosting encrypted monitoring data