CAJ | 학술논문

在互联网和多媒体技术迅速发展的大环境中，对数字版权进行保护大多采用的是数字水印技术，虽然这种技术保护手段具有一定的可靠性，但仍然需要数字版权保护协议对这种技术手段的保护作支持。本文在对传统数字水印协议的国内外研究现状、水印模型及其存在的问题全面研究与分析的基础上，提出了基于同态公钥加密算法的一种全新数字水印协议，对传统数字水印存在完全由可信任第三方嵌入或完全由卖方嵌入的问题进行了改进，使其克服了传统数字水印协议存在共谋攻击和不适用于二手交易市场的弊端。进而实现一种高效、公平的数字水印协议。
재호련망화다매체기술신속발전적대배경중，대수자판권진행보호대다채용적시수자수인기술，수연저충기술보호수단구유일정적가고성，단잉연수요수자판권보호협의대저충기술수단적보호작지지。본문재대전통수자수인협의적국내외연구현상、수인모형급기존재적문제전면연구여분석적기출상，제출료기우동태공약가밀산법적일충전신수자수인협의，대전통수자수인존재완전유가신임제삼방감입혹완전유매방감입적문제진행료개진，사기극복료전통수자수인협의존재공모공격화불괄용우이수교역시장적폐단。진이실현일충고효、공평적수자수인협의。
In the environment of the rapid development of the Internet and multimedia technology, digital copyright protection is widely used in digital watermarking technology, although the technical protection measures have certain reliability, but it still need digital copyright protection protocol on protection of this technology as support. In this paper, domestic and foreign research situation of traditional digital watermarking protocol, watermarking model are reviewed, and the existing problems are analyzed. Then, a new digital watermarking protocol based on homomorphic public key encryption algorithm is proposed. Traditional digital watermark exists the problem of watermark embedding solely by a trusted third party or by the seller. which is prone to collusion attack and thus is hard to be applied to a secondary market. To overcome the above questions, homomorphic encryption algorithm is introduced, and the proposed protocol made revision in details of transaction procedure. Thus, a secure and efficient watermark protocol is implemented.