Patent ID: 6236727
Filing Date: 2001-05-22
Classification: G06F,G11B,H04N

Abstract:
Apparatus for processing a scrambled data stream within a computer system having a central processing unit (CPU) coupled to receive the scrambled data stream, comprising:descrambling means within the central processing unit for descrambling the received, scrambled data stream to produce a clear data stream;re-encryption means within the central processing unit for re-encrypting the clear data stream to produce an encrypted data stream, wherein said scrambled data stream is produced from a different encryption algorithm than said encrypted data stream;means for transferring the encrypted data stream from the central processing unit to a second structure of the computer system, said second structure being coupled to the CPU; anddecryption means coupled to the second structure for receiving the encrypted data stream therefrom and for decrypting the encrypted data stream to produce said clear data stream, wherein said clear data stream is unexposed when transferred from the central processing unit to said second structure coupled to the CPU, while said descrambling means within the central processing unit accomplishes descrambling of the received scrambled data stream.