Patent ID: 7925016

Claim:
A method of descrambling digital content comprising: receiving scrambled digital content in a descrambler integrated circuit, the descrambler integrated circuit including a decryption hardware being a hardware circuit without any software control, the descrambler integrated circuit including a decryption block, a register circuit, and a descrambler; receiving an encrypted control word in the descrambler integrated circuit, the encrypted control word is received from a smart card, wherein encrypted control word is obtained by encrypting a control word in the smart card using a key stored in a register circuit of the smart card, wherein the key stored in the register circuit of the smart card is associated with a key stored in the register circuit of the descrambler integrated circuit; decrypting the encrypted control word by the decryption block using the key stored in the register circuit of the descrambler integrated circuit; and descrambling the scrambled digital content in the descrambler integrated circuit using the decrypted control word.