Abstract:
PURPOSE: An authentication system using a bar code and an authentication method are provided to enhance security for a signature key or an authentication certificate of a user. CONSTITUTION: A first user device(10) converts authentication related information provided by a service providing server(30) into a first bar code. A second user device(20) receives an input of the first bar code. The second user device generates authentication information or signature information about the authorization related information by using a signature key or an authentication certificate. The second user device provides the authentication information or the signature information to the service providing server.
Abstract:
PURPOSE: A method for copying certificates using barcodes and an apparatus thereof are provided to prevent separate additional expenses by copying a certificate without cable connection. CONSTITUTION: A control module of a first user device receives a certificate transfer command from a user(S100). The control module of the first user device authenticates the user(S110). The control module of the first user device changes the certificate saved in a hard disk or memory into a bar code(S120). The control module of the first user device displays the generated bar code on a screen(S130). The control module of a second user device receives the bar code outputted from the first user device(S140). The control module of the second user device extracts the certificate loaded in the bar code(S150). The control module of the second user device stores the extracted certificate in the memory(S160). The control module of the second user device authenticates the user(S170). The control module of the second user device displays the certificate transfer result on the screen(S180).
Abstract:
PURPOSE: An illegal content distributing/illegal distributor tracing system and a method thereof are provided to detect illegal content in a web hard server which installs a forensic mark detection module by using content ID information as a forensic mark. CONSTITUTION: A forensic mark generating unit(112) receives a content ID code from a content supplying device and generates a forensic mark. A forensic mark inserting unit(114) inserts the forensic mark to content. Content database(124) stores content in which the forensic mark is inserted. A content transmitting unit(120) transmits the content in which the forensic mark is inserted to the content using device.
Abstract:
PURPOSE: A watermarking inserting/detecting apparatus and a method thereof are provided to perform geometrical deformation, filtering deformation, and compression format change of a video. CONSTITUTION: A message encoding unit(110) encodes a watermark message. A watermark pattern generating unit(130) analyzes a video original copy. The watermark pattern generating unit generates a watermark pattern. A modulating unit(150) inserts the watermark message into a chrominance component frame of the video original copy.
Abstract:
PURPOSE: A privacy enhanced auction service supplying method and apparatus thereof are provided to enhance the privacy of a bidding participant through a ring signature technique. CONSTITUTION: A key generator(210) generates a signature private key and a public verification key. A service participation register(220) registers ring signature information to a service provider server for providing a bidding service. A convertible ring signature value generator(230) generates ring signature about bidding price.
Abstract:
PURPOSE: An anonymous authentication service method providing partial connectivity is provided to perform anonymous authentication operation based on Short Group Signature, by introducing the concept of sublink connectivity. CONSTITUTION: An admission process(S210) includes a service user subscription step(S211) and a service provider subscription step(S212). A group signature generation process(S220) generates a group signature through mutual cooperation. A group signature verification process(S230) is performed by a service providing server(120) or an arbitrary participant. A signer verification process(S240) is performed by an arbitrary ID verification server(130) and an anonymous authentication server(110). A sublink process(S250) is provided by the service providing server.
Abstract:
본 발명은 두 파일에서 이중 회귀나무 모형을 이용하여 통계적 결합을 통해 하나의 파일을 구성하는 자료 결합 방법에 관한 것으로, 본 발명의 자료 결합 방법은 동일한 모집단에서 추출된 서로 다른 두 파일을 가지고서 첫 번째 파일의 수용파일에 있는 고유변수를 목적변수로 공통변수를 입력변수로 정한다. 그리고 두 번째 파일의 제공파일을 가지고서 고유변수를 목적변수로 공통변수를 입력변수로 정하여 나무구조를 수립하며, 수용파일의 모든 끝 노드에서 포함한 개체 수만큼 제공파일의 끝 노드 번호가 동일한 개체들을 가지고서 이중 회귀나무모형에 의한 나무구조를 다시 수립한다. 여기서 얻어진 결과에서 제공파일의 동일한 공통변수에 포함된 제공파일의 고유변수의 값을 임의의 복원추출(random sampling)에 의한 방법으로 수용파일의 고유변수 빈 영역(자료)에 포함시켜 하나의 완성된 파일로 결합하는 통계적 결합을 수행하는 것이다. 이러한 통계적 결합을 적용하면, 필요로 하는 자료 획득을 위한 시간 및 비용을 줄일 수 있고 이에 따른 경제적 효과와 효율성을 높일 수 있다. 회귀 나무, 통계, 결합, 수용, 제공, 공통, 이중, 고유, 변수, 파일
Abstract:
A file matching method for composing one file through statistical matching by using a double regression tree model in two files is provided to obtain one complete file from two different files extracted from the same population by matching two different files statistically, and reduce cost/time needed for collecting data to be obtained from two different files. Different files respectively including a common variable and a consecutive unique variable having a different value are extracted as population. The common variable is set as an input variable and the consecutive unique variable is set as a target variable in recipient and donor files of the extracted different files. The recipient file is set as training data and the donor file is set as verification data. One complete file is generated by adding the unique variable(240) included in the donor file to an empty area of the unique variable(140) assigned to the recipient file based on the common variable(120) through statistical matching by using a double regression tree model when the common variables of the different files is identical with each other.