公开(公告)号：US20210135879A1

公开(公告)日：2021-05-06

申请号：US17088998

申请日：2020-11-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hwan Jo HEO ,  Hyun Jin LEE

IPC: H04L9/32 ,  H04L9/08

Abstract: A decentralized group signature method for an issuer-anonymized credential system includes (a) an initial system setup operation of defining elements of a group signature method and information that is generated and shared by each group member, (b) an initial group member setup operation, (c) a group member participation operation of adding a new group member to a group, (d) a group signature operation of putting a group signature on a specific message, (e) an operation of verifying the group signature, (f) an operation of removing anonymity from a group signature for a specific group member with agreement of group members, and (g) an operation of revoking a specific group member with agreement of the group members. Exclusive authority of a group manager is distributed to the group members.

公开(公告)号：US20220309514A1

公开(公告)日：2022-09-29

申请号：US17704100

申请日：2022-03-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyun Jin LEE ,  Dae Geun YOON ,  Ki Sung PARK

IPC: G06Q30/00 ,  H04L9/08 ,  G06Q20/38

Abstract: Provided is a method of proving ownership and an ownership transfer history using a decentralized identifier (DID). The method includes identifying, by a verifier terminal, a product through a DID and identifying an initial producer of the product through the DID, generating, by the verifier terminal, a proof-of-ownership verifiable credential (VC) of the product, which includes metadata including information on the VC, security information (claims) including information on a belonging, and issuing organization electronic signature information (proof) including a digital signature method and a signature value for content certification of the VC, and providing, by the verifier terminal, the generated proof-of-ownership VC of the product to the producer of the product and storing a DID document of the produced product in a decentralized external storage in a decentralized manner.

公开(公告)号：US20130189664A1

公开(公告)日：2013-07-25

申请号：US13692674

申请日：2012-12-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Jin LEE ,  Hwa Suk KIM ,  Sang Kwon KIM ,  Cho Rong YU ,  Uk JANG ,  Dong Hun LEE ,  Kee Seong CHO

IPC: G09B19/00

CPC classification number: G09B19/00 ,  G09B5/14

Abstract: Disclosed herein are a method and an apparatus for controlling an interactive lecture service capable of performing questions and answers during a lecture without using a media mixer. A method for providing a media stream switching based interactive lecture service, includes: receiving a right to speak request from at least one student terminal by a lecturer terminal; assigning the right to speak to a specific student terminal in response to the right to speak request and receiving at least one of the question video and voice of the specific student terminal, by the lecturer terminal; and transmitting at least one of the receiving question video and voice of the specific student terminal to a terminal included in a lecture session by the lecturer terminal.

Abstract translation: 这里公开了一种用于控制交互式演讲服务的方法和装置，其能够在讲座期间不使用媒体混合器来执行问题和答案。 一种用于提供基于媒体流切换的交互式演讲服务的方法，包括：由讲师终端从至少一个学生终端接收发言权; 向演讲者终端发送特定学生终端的发言权，以及至少收到特定学生终端的视频和语音的至少一个; 以及将所述特定学生终端的接收问题视频和语音中的至少一个发送到由讲师终端包括在演讲会话中的终端。