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Loading data into a mobile terminal

  • US 7,558,953 B2
  • Filed: 12/20/2002
  • Issued: 07/07/2009
  • Est. Priority Date: 01/18/2002
  • Status: Active Grant
First Claim
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1. A method of loading data into a mobile terminal data comprising payload data and header data, the method comprising the steps of:

  • receiving a header message from a loading station by a mobile terminal wherein the header message includes the header data having a cryptographic data item including a cryptographic checksum based on a message digest of the message calculated by a hash function;

    verifying the received header data by the mobile terminal;

    receiving the payload data, if the header data is verified successfully;

    accepting the payload data by the mobile terminal conditioned on a verification process based on the header data, wherein the payload data is divided into a number of blocks of payload data and the blocks of payload data do not carry authentication information;

    wherein receiving the payload data further comprises receiving a number of payload messages each including one of the number of blocks of payload data; and

    wherein accepting the payload data further comprises accepting each of the blocks of payload data by the mobile terminal conditioned on a cryptographic verification process based on a corresponding one of a number of received message digests and accepting the payload data conditioned on a verification of a received message digest calculated from a combination of all blocks of payload data.

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