Digital video broadcasting

An apparatus for descrambling broadcast video data, said apparatus comprising:

• a stream cipher, said stream cipher having:
• an input to receive scrambled video data;
• a first shift register, said first shift register capable of holding input data received by said input;
• an output, said output capable of holding output data from said stream cipher;
• a first logic mechanism coupled to said first shift register, said first logic mechanism capable of moving said stream cipher between logical states, said first logic mechanism further capable of providing said output data to said output of said stream cipher, said first logic mechanism having:
• an A logic;
• and
• a B logic coupled in sequence with said A logic, said A logic and said B logic constructed and arranged to carry out similar logical steps;
• a block cipher, said block cipher having:
• an output for providing de-scrambled broadcast video data;
• a second shift register, said second shift register capable of holding said output data from said stream cipher;
• a second logic mechanism coupled to said second shift register, said second logic mechanism capable of moving said block cipher between logical states, said second logic mechanism coupled to said output of said block cipher, said second logic mechanism having:
• a C logic;
• a D logic coupled in sequence with said C logic;
• a E logic coupled in sequence with said D logic;
• and
• a F logic coupled in sequence with said E logic, said C logic, said D logic, said E logic, and said F logic constructed and arranged to carry out similar logical steps.