멀티미디어 콘텐츠를 보호하기 위해 연구되고 있는 방법 중에서 선택암호화(selective encryption) 방식은 멀티미디어 콘텐츠를 부분적으로 암호화하는 방법으로 AES와 같은 전통적인 암호방식을 적용하는 방법과 비교하여 보안성은 떨어지지만 높은 보안성을 요구하지 않는 멀티미디어 콘텐츠 응용 분야에 적용될 수 있다. 본 논문에서는 DPSS(discrete prolate spheroidal sequence)를 이용하여 영상의 대역폭(bandwidth) 확장 없이 영상을 스크램블하는 Van De Ville의 방식과 이에 대한 보안성을 검증한 Shujun Li의 연구를 기초로 하여 영상을 보다 안전하게 스크램블하기 위한 개선 방법을 제안하였다. 제안 방식은 비밀행렬 구성시에 Hadamard 행렬 대신에 랜덤행렬을 이용하고, 통계적 특성과 비밀 행렬에 대한 예측에 의한 통계적 공격이나 기지평문공격에 대해 랜덤행렬을 가산하여 영상에 대한 랜덤성을 증가시켜 공격에 대한 보안성을 높이고자 하였다. 실험 결과들로부터 기존의 방법에 비해 각 공격에 대해 MAE(mean absolute error)의 값이 각각 25, 15, 80 이상 증가되어 보안성이 증가됨을 확인하였다. 또한 제안 방식은 워터마크 응용에 적용하여 접근 제어나 복사 제어에 적용할 수 있음을 제시하였다.
KSP Keywords
Discrete Prolate Spheroidal, Mean Absolute Error, Selective encryption
Copyright Policy
ETRI KSP Copyright Policy
The materials provided on this website are subject to copyrights owned by ETRI and protected by the Copyright Act. Any reproduction, modification, or distribution, in whole or in part, requires the prior explicit approval of ETRI. However, under Article 24.2 of the Copyright Act, the materials may be freely used provided the user complies with the following terms:
The materials to be used must have attached a Korea Open Government License (KOGL) Type 4 symbol, which is similar to CC-BY-NC-ND (Creative Commons Attribution Non-Commercial No Derivatives License). Users are free to use the materials only for non-commercial purposes, provided that original works are properly cited and that no alterations, modifications, or changes to such works is made. This website may contain materials for which ETRI does not hold full copyright or for which ETRI shares copyright in conjunction with other third parties. Without explicit permission, any use of such materials without KOGL indication is strictly prohibited and will constitute an infringement of the copyright of ETRI or of the relevant copyright holders.
J. Kim et. al, "Trends in Lightweight Kernel for Many core Based High-Performance Computing", Electronics and Telecommunications Trends. Vol. 32, No. 4, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
J. Sim et.al, “the Fourth Industrial Revolution and ICT – IDX Strategy for leading the Fourth Industrial Revolution”, ETRI Insight, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
If you have any questions or concerns about these terms of use, or if you would like to request permission to use any material on this website, please feel free to contact us
KOGL Type 4:(Source Indication + Commercial Use Prohibition+Change Prohibition)
Contact ETRI, Research Information Service Section
Privacy Policy
ETRI KSP Privacy Policy
ETRI does not collect personal information from external users who access our Knowledge Sharing Platform (KSP). Unathorized automated collection of researcher information from our platform without ETRI's consent is strictly prohibited.
[Researcher Information Disclosure] ETRI publicly shares specific researcher information related to research outcomes, including the researcher's name, department, work email, and work phone number.
※ ETRI does not share employee photographs with external users without the explicit consent of the researcher. If a researcher provides consent, their photograph may be displayed on the KSP.