Patent ID: 7797551

Claim:
A media device chip comprising: one or more circuits operable for, at least: first generating a first hashed data sequence from a received verification sequence; implementing a hashing function for generating a second hashed data sequence; second generating a first encryption key which is a function of an output generated by a first linear feedback shift register; first storing a second key, a word, and an identifier word into a one time programmable memory; second storing an output of said first linear feedback shift register, a timer value, and an enable status indicator into a non-volatile memory; synchronizing said first linear feedback shift register to a second linear feedback shift register; comparing said first hashed data sequence with said second hashed data sequence; and generating a control signal for incrementing the state of said first linear feedback shift register and enabling operation of said media device chip if said first hashed data sequence is equal to said second hashed data sequence, said word comprising at least 64 bits.