• Journal of the Korea Computer Industry Society
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• v.5 no.5
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• pp.699-710
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• 2004

It is one of important techniques to protect illegal uses and forgeries for text databases when the internet has become widsepread. Lots of studies and system developments has been progressed in order to protect text databases, important documents of the companies, and blueprints of the research institutes. Given this project securing the KISTI (Korea Institute of Science and Teschnology Information) digital contents, we are to design a watermaking and fingerprinting system protecting document images, and a agent notifying the traitors' location.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.375-379
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• 2008

디지털 핑거프린팅(Digital Fingerprinting) 기술은 구매자의 정보를 인지할 수 없는 방법으로 삽입하는 방법이다. 본 논문에서는 핑거프린팅 기법을 사용하여 웹 서버에 요청이 들어온 모든 웹 페이지에 핑거프린팅 기술의 조건을 충족시키는 방법으로, 정보를 삽입하여 보여 지는 웹 페이지의 변화 없이 사용자의 IP정보를 웹 페이지에 포함시켜 전송할 수 있는 알고리즘을 제시하고 웹페이지 핑거프린팅을 해주는 서버이용의 장점을 알아보도록 한다.

• Journal of KIISE:Computer Systems and Theory
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• v.34 no.7
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• pp.288-295
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• 2007

The illegal copying and redistribution of digitally-stored information is a crucial problem to distributors who electronically sell digital data. fingerprinting scheme is a technique which supports copyright protection to track redistributors of electronic information using cryptographic techniques. Anonymous asymmetric fingerprinting scheme prevents the merchant from framing a buyer by making the fingerprinted version known to the buyer only. And this scheme allows the buyer to purchase goods without revealing her identity to the seller. In this paper, a new anonymous asymmetric fingerprinting scheme with TTP is introduced. The buyer's fingerprint is generated by the Fingerprint Certificate Authority which is a TTP. When the seller embeds the fingerprint in the digital data, the protocol uses the homomorphic encryption scheme. Thus the seller cannot know the buyer's fingerprint and the buyer's anonymity is guaranteed by using anonymous key pair.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.1
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• pp.7-13
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• 2022

Radio frequency fingerprinting refers to a methodology that extracts hardware-specific characteristics of a transmitter that are unintentionally embedded in a transmitted waveform. In this paper, we put forward a fingerprinting feature and deep learning structure that can identify the same type of Digital Mobile Radio(DMR) by inputting the in-phase(I) and quadrature(Q). We proposes using the magnitude in polar coordinates of I/Q as RF fingerprinting feature and a modified ResNet-1D structure that can identify them. Experimental results show that our proposed modified ResNet-1D structure can achieve recognition accuracy of 99.5% on 20 DMR.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.427-428
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• 2006

This paper presents an image fingerprinting scheme for the print-to-capture model performed by a photo printer and digital camera. When capturing an image by a digital camera, various kinds of distortions such as noise, geometrical distortions, and lens distortions are applied. slightly and simultaneously. In this paper, we consider several steps to extract fingerprints from the distorted image in print-and capture scenario. To embed ID into an image as a fingerprint, multi-bits embedding is applied. We embed 64 bits information as a fingerprint into spatial domain of color images. In order to restore a captured image from distortions a noise reduction filter is performed and a rectilinear tiling pattern is used as a template. To make the template, a multi-bits fingerprint is embedded repeatedly like a tiling pattern. We show that the extracting is successful from the image captured by a digital camera through the experiment.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.10 no.4
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• pp.47-57
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• 2000

This paper proposes efficient anonymous fingerprinting with improved automatic identification of redistributors in electronic commerce of digital contents. The proposed scheme by Domingos in Eletronic Letters is inefficient in electronic commerce, because of pass numbers in registration protocol and exponential computations in identification protocol. Our scheme is reduced 2-pass in registraton protocol and is required only 1 time exponential computation than his in identification protocol. According to electronic commerce of digital contents used in ordinary life, our schemes values are increased.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.633-636
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• 2008

디지털 핑거프린팅(Digital Fingerprinting) 기술은 워터마킹(Watermarking)기술의 한 분야로 콘텐츠에 구매자의 정보를 인지할 수 없는 방법으로 삽입한다는 측면에서 저작권을 위한 판매자의 정보를 삽입하는 워터마킹과 구분된다. 핑거프린팅 기술에서는 주로 구매자의 정보를 삽입하기 때문에 콘텐츠를 처음으로 유포한 구매자를 역 추적할 수 있는 기능(trace traitor)을 제공하는데 본 논문에서는 저작권 보호에 주된 초점이 맞춰져 있는 워터마크 기술을 응용, 핑거프린팅 기법을 사용하여 웹 서버를 통하여 핑거프린팅 기술의 조건을 충족시키는 방법으로 정보를 삽입하여 보여 지는 웹 페이지의 변화없이 판매자가 아닌 구매자(사용자)의 IP정보를 전송할 수 있는 알고리즘을 제안한다.

• Journal of Digital Convergence
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• v.11 no.4
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• pp.243-249
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• 2013

In this paper, GPS(Global Positioning System) that can be used outdoors and GPS(Global Positioning System) is not available for indoor Wi-Fi(Wireless Fidelity) using the Android-based location information system has been designed and implemented. Pedestrians in a room in order to estimate the location of the pedestrian's position, regardless of need to obtain the absolute position and relative position, depending on the movement of pedestrians in a row it is necessary to estimate. In order to estimate the initial position of the pedestrian Wi-Fi Fingerprinting was used. Most existing Wi-Fi Fingerprinting position error small WKNN(Weighted K Nearest Neighbor) algorithm shortcoming EWKNN (Enhanced Weighted K Nearest Neighbor) using the algorithm raised the accuracy of the position. And in order to estimate the relative position of the pedestrian, the smart phone is mounted on the IMUInertial Measurement Unit) because the use did not require additional equipment.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2006.11a
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• pp.313-316
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• 2006

디지털 핑거프린팅(Digital Fingerprinting)은 기 밀 정보를 디지털 콘텐츠에 삽입하는 측면에서는 디지털 워터마킹과 동일 하다고 볼 수 있으나 저작권자나 판매자의 정보가 아닌 콘텐츠를 구매한 사용자의 정보를 삽입함으로써 콘텐츠 불법 배포자를 추적할 수 있도록 한다는 점에서 워터마킹과 차별화된 기술이다. 이러한 핑거프린팅 기술은 소유권에 대한 인증뿐만 아니라 개인 식별 기능까지 제공해야 하므로 기존의 워터마킹이 갖추어야 할 요구사항인 비가시성, 견고성, 유일성과 더불어 공모허용, 비대칭성, 익명성, 조건부 추적성 등이 부가적으로 필요하다. 본 논문에서는 행렬의 한 열을 선택 후 쉬프팅 기법을 사용 하서 사용자 정보로 조합하여 핑거프린트를 생성하였다. 이렇게 생성된 핑거프린트 정보를 2레벨 웨이블릿 변환 영역 중 LH2, HL2, HH2 부대역에 삽입하였다. 쉬프팅 정보와 도메인 개념을 사용하여 보다 많은 사용자에게 핑거프린트 정보를 삽입할 수 있으며, 공모공격과 JPEG 압축에서도 최소한 1명 이상의 공모자를 검출할 수 있는 핑거프린팅의 기본 조건을 만족하였다.

• Korea Multimedia Society
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• v.8 no.2
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• pp.54-64
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• 2004