Resources Contact Us Home
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
Compounds for the reduction of .beta.-amyloid production
Method and apparatus for complementing an instrument panel by utilizing augmented reality
Method for detecting security error in mobile telecommunications system and device of mobile telecommunications
Adhering composition and method of applying the same
Resolution setting apparatus, resolution setting method, and recording medium recording a resolution setting program when a television is used as a monitor of a computer
Method and system for modularized configurable connector system for ethernet applications
Drug comprising as the active ingredient proliferative vector containing survivin promoter
  Randomly Featured Patents
Plum tree
Toner compositions containing certain cleaning additives
Planetary mechanism having a fluid baffle
Coaxial optical scanner
Magnetron with wavy straps
Spline checking fixture
Image forming method and ink composition
Water based ink capable of decolorizing or discoloring and a process for the production of the same
High voltage fast pulse control for a Q-switched laser
Glass head fishing lure