Patents by Inventor Ji-Hoon Cho

Ji-Hoon Cho 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: 20170126396
    Abstract: Disclosed are an apparatus and a method for encryption. The apparatus includes a key table generator configured to generate random values based on a seed value and generate a key table including the generated random values; and an encryptor configured to apply the generated key table to a round function, generate a block encryption algorithm having a Feistel structure based on the round function, and encrypt a plaintext data block based on the generated block encryption algorithm.
    Type: Application
    Filed: December 28, 2015
    Publication date: May 4, 2017
    Applicants: SAMSUNG SDS CO., LTD., CARMEL HAIFA UNIVERSITY ECONOMIC CORP. LTD., BAR-ILAN UNIVERSITY
    Inventors: Duk-Jae MOON, Ji-Hoon CHO, Kyu-Young CHOI, Nathan KELLER, Orr DUNKELMAN, Itai DINUR
  • Publication number: 20170126395
    Abstract: Disclosed are an apparatus and a method for encryption. The apparatus includes, a key table generation unit configured to generate random values derived from a seed value and generate a key table including the generated random values, and an encryption unit configured to encrypt a plain text data block by generating an encryption algorithm by repeatedly combining the generated key table with a permutation function in a crossing manner, and using the generated encryption algorithm.
    Type: Application
    Filed: February 23, 2016
    Publication date: May 4, 2017
    Applicants: SAMSUNG SDS CO., LTD., CARMEL HAIFA UNIVERSITY ECONOMIC CORP. LTD., BAR-ILAN UNIVERSITY
    Inventors: Duk-Jae MOON, Ji-Hoon CHO, Kyu-Young CHOI, Nathan KELLER, Orr DUNKELMAN, Itai DINUR
  • Publication number: 20170118021
    Abstract: An encryption apparatus includes a table generator configured to generate a key table based on each of a plurality of encryption keys, the plurality of encryption keys having different attributes, generate a key-independent table independent of the plurality of encryption keys, and generate an encryption algorithm based on the key table and the key-independent table; and a transmitter configured to transmit the key table and the key-independent table to a client terminal, wherein the table generator and the transmitter are implemented by using at least one hardware processor.
    Type: Application
    Filed: January 13, 2016
    Publication date: April 27, 2017
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Duk-Jae Moon, Ji-Hoon Cho, Kyu-Young Choi
  • Publication number: 20170116393
    Abstract: A digital rights management (DRM) provision apparatus includes a first encryptor configured to encrypt content using a first white-box cryptograph (WBC)-based encryption, in which a first secret key is internalized, and a symmetric key-based encryption using a content encryption key; a second encryptor configured to encrypt the content encryption key using a second WBC-based encryption in which a second secret key is internalized; and a transmitter configured to transmit the encrypted content and the encrypted content encryption key to a content playback apparatus of a registered user.
    Type: Application
    Filed: December 28, 2015
    Publication date: April 27, 2017
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young Choi, Ji-Hoon Cho, Duk-Jae Moon
  • Patent number: 9621519
    Abstract: Disclosed are a system and method for exchanging a key based on user authentication information. The system for exchanging a key based on user authentication information includes a terminal configured to generate an ID-based ciphertext corresponding to authentication information of a user of the terminal using a terminal-side random number and a server ID and a server configured to decrypt the ID-based ciphertext that is received from the terminal using a server-side private key corresponding to the server ID to restore the authentication information, authenticate the terminal using the restored authentication information, and generate a server-side session key corresponding to the authenticated terminal.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 11, 2017
    Assignee: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young Choi, Ji-Hoon Cho, Hyo-Jin Yoon
  • Publication number: 20170085543
    Abstract: Disclosed herein are an apparatus and method for exchanging an encryption key.
    Type: Application
    Filed: April 28, 2016
    Publication date: March 23, 2017
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young CHOI, Seon-Young LEE, Ki-Young KIM, Ji-Hoon CHO
  • Patent number: 9515821
    Abstract: Provided is an apparatus for encrypting data including a key determiner configured to determine a cipher key for white-box cryptography (WBC)-based encryption and a symmetric key different from the cipher key and an encrypter configured to generate a ciphertext of the data using the WBC-based encryption and symmetric-key-based encryption with the symmetric key.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: December 6, 2016
    Assignee: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young Choi, Ji-Hoon Cho, Hyo-Jin Yoon
  • Publication number: 20160330179
    Abstract: Disclosed are a system and method for key exchange based on user authentication information. The system for key exchange based on user authentication information includes a client configured to generate ciphertext corresponding to authentication information of a user of the client using a random number for the client and server identification information, and a server configured to decrypt the ciphertext received from the client using a private key for the server corresponding to the server identification information to restore the authentication information, authenticate the client using the restored authentication information, and generate a session key for the server corresponding to the authenticated client.
    Type: Application
    Filed: April 28, 2016
    Publication date: November 10, 2016
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young CHOI, Ji-Hoon CHO, Hyo-Jin YOON
  • Publication number: 20160080144
    Abstract: Provided is an apparatus for encrypting data including a key determiner configured to determine a cipher key for white-box cryptography (WBC)-based encryption and a symmetric key different from the cipher key and an encrypter configured to generate a ciphertext of the data using the WBC-based encryption and symmetric-key-based encryption with the symmetric key.
    Type: Application
    Filed: December 19, 2014
    Publication date: March 17, 2016
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young CHOI, Ji-Hoon CHO, Hyo-Jin YOON
  • Publication number: 20160072775
    Abstract: Disclosed are a system and method for exchanging a key based on user authentication information. The system for exchanging a key based on user authentication information includes a terminal configured to generate an ID-based ciphertext corresponding to authentication information of a user of the terminal using a terminal-side random number and a server ID and a server configured to decrypt the ID-based ciphertext that is received from the terminal using a server-side private key corresponding to the server ID to restore the authentication information, authenticate the terminal using the restored authentication information, and generate a server-side session key corresponding to the authenticated terminal.
    Type: Application
    Filed: December 19, 2014
    Publication date: March 10, 2016
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Kyu-Young CHOI, Ji-Hoon CHO, Hyo-Jin YOON
  • Publication number: 20160036842
    Abstract: A message checking apparatus comprising one or more processors, the message checking apparatus includes: a uniform resource locator(URL) extracting unit to check, when a message is received, whether a URL is included in the message and extract the URL from the message; a communication unit to download an application using the URL; and an authorization/application program interface(API) verifying unit to check whether an authorization or API having a security risk is included in the application to be downloaded through the communication unit and then determine whether the URL is malicious based thereon.
    Type: Application
    Filed: October 13, 2015
    Publication date: February 4, 2016
    Inventors: Yong-hak LEE, Ji Hoon CHO
  • Publication number: 20150253161
    Abstract: A wheel fixing unit includes: a body; a plurality of wheel connectors protruding forward from the body and connected to a tool connection hole in a wheel of a vehicle; and a cable connector protruding rearward from the body and including a connection terminal formed on a protruding end side such that a cable is connectable thereto. A calibration device using the wheel fixing unit includes: wheel fixing units respectively coupled to left and right wheels of a vehicle; a target board installed spaced apart in a direction corresponding to a vehicle body and configured such that a transmission signal of a sensor mounted on a front or rear surface of the vehicle body is reflected by a reflector and is incident on the sensor; and an interval maintaining cable connected to one end of the wheel fixing unit and one of the both sides of the target board.
    Type: Application
    Filed: March 5, 2015
    Publication date: September 10, 2015
    Inventors: Hyung Suk HAM, Ji Hoon CHO
  • Publication number: 20150035697
    Abstract: Disclosed herein is a radar calibration system for vehicles. The radar calibration system for vehicles includes a target simulator receiving a radar signal through a reception antenna, delaying the received signal through a delay line, and transmitting the delayed signal through a transmission antenna, and a radar apparatus transmitting the radar signal to the target simulator through a transmission antenna, receiving the delayed signal from the target simulator through a plurality of reception antennas, calculating phase differences among the delayed signals received through the plurality of reception antennas, and generating and storing phase correction values of reception channels of the plurality of reception antennas to correct the calculated phase differences.
    Type: Application
    Filed: June 16, 2014
    Publication date: February 5, 2015
    Inventor: Ji-Hoon CHO
  • Publication number: 20140073516
    Abstract: Concentrations of certain miRNA, mRNA and/or protein markers in the biological fluids and/or tissues of a subject are used to determine the probability that the subject does or does not have Posttraumatic Stress Disorder (PTSD). The concentrations of these markers in fluids and/or tissues are different in subjects with PTSD as compared to subjects who do not suffer from this disorder.
    Type: Application
    Filed: March 14, 2013
    Publication date: March 13, 2014
    Applicant: INSTITUTE FOR SYSTEMS BIOLOGY
    Inventors: Leroy HOOD, Kai Wang, Inyoul Lee, Yong Zhou, Ji Hoon Cho, Dhimankrishna Ghosh
  • Publication number: 20140073524
    Abstract: Concentrations of certain miRNA, mRNA and/or protein markers in the biological fluids and/or tissues of a subject are used to determine the probability that the subject does or does not have Posttraumatic Stress Disorder (PTSD). The concentrations of these markers in fluids and/or tissues are different in subjects with PTSD as compared to subjects who do not suffer from this disorder.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 13, 2014
    Applicant: Institute for Systems Biology
    Inventors: Leroy HOOD, Kai WANG, Inyoul LEE, Yong ZHOU, Ji Hoon CHO, Dhimankrishna GHOSH
  • Patent number: 8121210
    Abstract: A Multiple Input Multiple Output (MIMO) wireless communication system is provided. A receiving end apparatus includes an estimator for estimating a channel between a plurality of Transmit (Tx) antennas of a transmitting end and a plurality of Receive (Rx) antennas of a receiving end; a filter for extracting a sum between interference and noise included in an Rx signal by using the estimated channel value and for computing a covariance matrix for the sum between the interference and the noise; and a detector for detecting a Tx signal by using a signal processing matrix generated from the covariance matrix.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: February 21, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ji-Hoon Cho, Kyun-Byoung Ko, Sung-Kwon Jo, Jae-Hyok Lee
  • Publication number: 20080181342
    Abstract: A Multiple Input Multiple Output (MIMO) wireless communication system is provided. A receiving end apparatus includes an estimator for estimating a channel between a plurality of Transmit (Tx) antennas of a transmitting end and a plurality of Receive (Rx) antennas of a receiving end; a filter for extracting a sum between interference and noise included in an Rx signal by using the estimated channel value and for computing a covariance matrix for the sum between the interference and the noise; and a detector for detecting a Tx signal by using a signal processing matrix generated from the covariance matrix.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 31, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hoon Cho, Kyun-Byoung Ko, Sung-Kwon Jo, Jae-Hyok Lee
  • Publication number: 20080135970
    Abstract: High voltage schottky diodes are provided including a first conductivity type semiconductor substrate and a second conductivity type well region defined by the substrate. A first conductive film is provided on a surface of the substrate including the well. A conductive electrode is provided on at least one side of the first conductive film above the substrate including the well. An insulating film is provided between the conductive electrode and the substrate. A cathode contact region is provided outside the conductive electrode remote from the first conductive film. The cathode contact region is doped with high concentration impurities having a second conductive type.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 12, 2008
    Inventors: Yong-don Kim, Sun-hyun Kim, Jung-soo Yoo, Ji-hoon Cho, Seung-teck Lee