Patents by Inventor Seung-Kwang LEE

Seung-Kwang LEE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140286486
    Abstract: In accordance with an embodiment, the logical exclusive operation on the random number RAND and the OPc value are performed several times, the logical operation and encryption processing using a random number RAND and logical operation and encryption processing using a random number S are done in any order, which brings an increase of an attack complexity as to whether to calculate the correlation coefficient from the power consumption waveform at any point when analyzing the correlation power, whereby it is possible to defend the CPA attack effectively.
    Type: Application
    Filed: July 16, 2013
    Publication date: September 25, 2014
    Inventors: Seung Kwang LEE, Doo Ho CHOI, Taesung KIM, Yong-Je CHOI, Kyunghee OH, Ju Han KIM
  • Publication number: 20130208886
    Abstract: Disclosed herein are a method of preventing fault-injection attacks on Chinese Remainder Theorem (CRT)-Rivest Shamir Adleman (RSA) cryptographic operations, and a recording medium for storing a program implementing the same. First, the method receives first and second primes, that is, different primes, and a randomly selected prime, that is, a random prime, which are used for CRT-RSA cryptographic operations. Thereafter, a cumulative value is calculated by performing an XOR (Exclusive OR) operation on the first prime, the second prime, and the random prime using a push function. Thereafter, the first prime, the second prime, and the random prime are loaded by performing an XOR operation on the cumulative value using a pop function corresponding to the push function. Finally, CRT-RSA operations are executed by computing modulo operations based on the first prime and the second prime.
    Type: Application
    Filed: August 14, 2012
    Publication date: August 15, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seung-Kwang LEE, Doo-Ho Choi, Hyun-Sook Cho