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METHOD AND APPARATUS FOR SECURE COMMUNICATION BETWEEN CRYPTOGRAPHIC SYSTEMS USING REAL TIME CLOCK

  • US 20090138743A1
  • Filed: 04/15/2008
  • Published: 05/28/2009
  • Est. Priority Date: 11/22/2007
  • Status: Active Grant
First Claim
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1. A method for secure communication between cryptographic systems using a Real Time Counter (RTC), comprising:

  • calculating a largest RTC deviation between a transmitting cryptographic system and a receiving cryptographic system;

    calculating the smallest number of bits of partial data on an RTC required for restoring entire data on the RTC on the basis of the calculated largest RTC deviation;

    calculating the partial RTC data on the basis of the calculated smallest number of bits of the partial RTC data; and

    transferring the calculated partial RTC data to the receiving cryptographic system.

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