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Communications system and method

  • US 20070234050A1
  • Filed: 04/04/2006
  • Published: 10/04/2007
  • Est. Priority Date: 04/04/2006
  • Status: Abandoned Application
First Claim
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1. A communications method to be implemented by transmitting and receiving devices in a communications system, said communications method comprising a basic send transmission procedure to be performed by the transmitting device for processing packets to be sent to the receiving device, and a basic receive transmission procedure to be performed by the receiving device for processing the packets received from the transmitting device, wherein said basic send transmission procedure includes:

  • a) composing an initial packet segment that includes data to be transmitted, a device identification code of the transmitting device, a copy protection code, and a network identification code, b) generating an encryption key, selecting a first coding value from a first hash table according to the encryption key, and encrypting the initial packet segment composed in step a) according to the first coding value thus selected to result in an encrypted packet segment, c) generating an error detection code, and forming a transmit packet that includes the encryption key, the encrypted packet segment, and the error detection code, and d) transmitting the transmit packet; and

    wherein said basic receive transmission procedure includes;

    e) receiving the transmit packet transmitted by the transmitting device, f) inspecting the error detection code in the transmit packet to determine if there is any error in the transmit packet, g) if there is no error in the transmit packet, using the encryption key to select a second coding value from a second hash table identical to the first hash table, and decrypting the encrypted packet segment of the transmit packet using the second coding value thus selected to obtain the initial packet segment composed by the transmitting device, h) verifying the transmit packet by inspecting the network identification code and the copy protection code, and i) processing the data transmitted in the transmit packet upon successful verification of the transmit packet.

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