METHOD AND APPARATUS FOR SECURE COMMUNICATION BETWEEN CRYPTOGRAPHIC SYSTEMS USING REAL TIME CLOCK
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are a method and apparatus for secure communication between cryptographic systems using a Real Time Clock (RTC). The method and apparatus allow a transmitting cryptographic system to transfer partial RTC data and a receiving cryptographic system to restore entire RTC data, thereby minimizing data to be transferred between the cryptographic systems. The method includes: 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.
-
Citations
12 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for secure communication between cryptographic systems using a Real Time Counter (RTC), comprising:
-
a largest RTC deviation calculator for calculating a largest RTC deviation between a transmitting cryptographic system and a receiving cryptographic system; a partial RTC data calculator for 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; a partial RTC data extractor for calculating the partial RTC data on the basis of the calculated smallest number of bits of the partial RTC data; and a partial RTC data transmitter for transferring the calculated partial RTC data to the receiving cryptographic system. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification