The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2011
Filed:
Apr. 15, 2008
Jae Heon Kim, Daejeon, KR;
Jae Woo Han, Daejeon, KR;
Dong Chan Kim, Daejeon, KR;
Sang Woo Park, Daejeon, KR;
Jae Heon Kim, Daejeon, KR;
Jae Woo Han, Daejeon, KR;
Dong Chan Kim, Daejeon, KR;
Sang Woo Park, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
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.