So couldn't someone just capture (i.e. write to hard disk) the encrypted bits coming out of an HDCP protected port. Then later using the master key they could go back and decrypt the captured data
This doesn't sound any easier than decrypting in real time and recording the decrypted stream — in either case I think you need an FPGA. Also, you may be forgetting the authentication protocol.
This doesn't sound any easier than decrypting in real time and recording the decrypted stream — in either case I think you need an FPGA. Also, you may be forgetting the authentication protocol.