公开(公告)号：US20220150047A1

公开(公告)日：2022-05-12

申请号：US17367252

申请日：2021-07-02

Applicant: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION ,  INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITY

Inventor： Eunsang LEE ,  Joon-Woo LEE ,  Jong-Seon NO ,  Young-Sik KIM

IPC: H04L9/00

Abstract: Disclosed is an electronic apparatus. The electronic apparatus includes a memory storing a composite function in which at least two polynomials are composed and a processor configured to, based on a comparison operation command being received for a plurality of homomorphic ciphertexts, perform operation by reflecting the plurality of homomorphic ciphertexts to the composite function, and obtain a comparison result of the plurality of homomorphic ciphertexts based on the operation result, each of the at least two polynomials may output a value in a preset range for a value in a preset domain, and a domain of one of the at least two polynomials may be determined based on a range of a previous polynomial.

公开(公告)号：US20220027617A1

公开(公告)日：2022-01-27

申请号：US17382665

申请日：2021-07-22

Applicant: Industry-Academic Cooperation Foundation, Chosun University

Inventor： Sung Bum PAN ,  Jae Myung KIM ,  Gyu Ho CHOI

IPC: G06K9/00

Abstract: The present disclosure relates to a user recognition method and a user recognition apparatus using a two-dimensional (2D) electromyogram (EMG) spectrogram image. The user recognition method using a 2D EMG spectrogram image may include (a) acquiring a one-dimensional EMG signal for a user, (b) converting the acquired one-dimensional EMG signal to a 2D EMG spectrogram image including a temporal feature and a frequency feature, and (c) recognizing the user based on the 2D EMG spectrogram image.

公开(公告)号：US20210376998A1

公开(公告)日：2021-12-02

申请号：US17320181

申请日：2021-05-13

Applicant: Seoul National University R&DB Foundation ,  Industry-Academic Cooperation Foundation, Chosun University

Inventor： Jong Seon NO ,  Young Sik KIM ,  Joon Woo LEE

IPC: H04L9/00 ,  G06F16/31 ,  H04L9/08 ,  H04L9/06

Abstract: Provided are an electronic device for sorting homomorphic ciphertext by using shell sorting and an operating method thereof to sort ciphertext generated by using homomorphic encryption according to a size of an original number corresponding thereto.

公开(公告)号：US20210351912A1

公开(公告)日：2021-11-11

申请号：US17192162

申请日：2021-03-04

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SNU R&DB FOUNDATION ,  Industry-Academic Cooperation Foundation, Chosun University

Inventor： Jung-Seon NO ,  Joonwoo LEE ,  Young-Sik KIM ,  Youngwoo LEE ,  Eunsang LEE

IPC: H04L9/00

Abstract: An encryption method and apparatus based on homomorphic encryption using an odd function property. The encryption method includes generating a ciphertext by encrypting data, and bootstrapping the ciphertext by performing a modular reduction based on an odd function property for a modulus corresponding to the ciphertext.

公开(公告)号：US11169116B2

公开(公告)日：2021-11-09

申请号：US16694220

申请日：2019-11-25

Applicant: Industry-Academic Cooperation Foundation, Chosun University

Inventor： Jin Yi Lee

IPC: G01N27/90 ,  H01F41/04 ,  G01B7/06 ,  G01N27/02

Abstract: Disclosed herein are a probe for a nondestructive testing device using a crossed gradient induced current and a method of manufacturing an induction coil for a nondestructive testing device. The probe for a nondestructive testing device using a crossed gradient induced current includes an induction coil formed to have a predetermined width and to generate first and second induced currents in a direction crossing each other when a current is applied from a power supply, and a magnetic sensor part installed adjacent to the induction coil so as to measure the first and second induced currents induced from the induction coil.

公开(公告)号：US20210336765A1

公开(公告)日：2021-10-28

申请号：US17236176

申请日：2021-04-21

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SNU R&DB FOUNDATION ,  Industry Academic Cooperation Foundation Chosun University

Inventor： Jong Seon NO ,  Yong Woo LEE ,  Eunsang LEE ,  Joon Woo LEE ,  Young Sik KIM

IPC: H04L9/00 ,  G06F7/548 ,  H04L9/06

Abstract: An encryption method and apparatus based on homomorphic encryption using a composition of functions. The encryption method includes generating a ciphertext by encrypting data, and bootstrapping the ciphertext by performing a modular reduction based on a composition of a function for a modulus corresponding to the ciphertext.

公开(公告)号：US11128475B2

公开(公告)日：2021-09-21

申请号：US16699097

申请日：2019-11-28

Applicant: Seoul National University R&DB Foundation ,  Industry-Academic Cooperation Foundation, Chosun University

Inventor： Jong Seon No ,  Young Sik Kim ,  Yong Woo Lee ,  Wi Jik Lee

IPC: H04L29/06 ,  H04L9/32 ,  H04L9/06

Abstract: Provided is an electronic signature technique depending on a diametrically different algorithm from the existing asymmetric key infrastructure electronic signature technique which generates predetermined syndrome data based on a message to be transmitted a data receiving device and then detects an error vector for an electronic signature from the syndrome data by using a parity check matrix and then generates an electronic signature value based on an error vector for the electronic signature and transmits the generated electronic signature value to the data receiving device.

公开(公告)号：US11020037B2

公开(公告)日：2021-06-01

申请号：US16389498

申请日：2019-04-19

Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION CHOSUN UNIVERSITY

Inventor： Sung-Bum Pan ,  Gyu-Ho Choi

IPC: A61B5/352 ,  A61B5/00

Abstract: An R wave peak detection method uses the periodicity of an electrocardiogram signal, in which expected R wave peaks are detected from an electrocardiogram signal, and a time difference between the expected R wave peaks that are detected is calculated in order to output, as actual R wave peaks, only expected R wave peaks that are greater than a threshold time difference, thereby avoiding a case in which the R wave peaks are erroneously detected from an non-ideal electrocardiogram signal.

公开(公告)号：US10994121B2

公开(公告)日：2021-05-04

申请号：US15848545

申请日：2017-12-20

Applicant: Industry-Academic Cooperation Foundation, Chosun University

Inventor： Youn Tae Kim ,  Jae Hyo Jung ,  Ji Hoon Lee ,  Si Ho Shin

IPC: A61B5/0408 ,  A61B5/0478 ,  A61N1/04 ,  C01B32/168 ,  C09J183/04 ,  C08L83/04 ,  A61B5/0492 ,  A61B5/04 ,  A61B5/00 ,  C08L83/14 ,  C08G77/20 ,  C08G77/50

Abstract: A Carbon NanoTube (CNT) composite electrode includes a lower electrode having a through-hole formed therein, and configured to be attached to the skin of a subject body to detect a biosignal, an upper electrode provided on one surface of the lower electrode to form an enclosed space between the lower electrode and the upper electrode, and configured to receive the biosignal detected by the lower electrode, and an air discharge portion formed in at least one of the lower electrode and the upper electrode, and discharging air present in the enclosed space and the through-hole externally so as to be configured to allow the upper electrode and the lower electrode to be attached to the skin of the subject body via vacuum suction.

公开(公告)号：US20210117523A1

公开(公告)日：2021-04-22

申请号：US16870251

申请日：2020-05-08

Applicant: Industry-Academic Cooperation Foundation, Chosun University

Inventor： Youn Tae KIM ,  Jae Hyo JUNG ,  Si Ho SHIN ,  Min Gu KANG

IPC: G06F21/32 ,  G06F3/01 ,  G06N20/10

Abstract: Provided is an electromyogram (EMG) signal-based user authentication apparatus and method. The apparatus includes an EMG signal receiver configured to receive an EMG signal measured using an EMG sensor, a pre-processor configured to remove a partial signal from the received EMG signal according to a preset frequency band, and a controller configured to authenticate a user by comparing a pre-stored EMG signal with the EMG signal in which the partial signal has been removed.