数字图象的一种可恢复性主动数字签名方法RADS

A Recoverable Active Digital Signature Method forDigital Images:RADS

本文根据多媒体信息的特点和多媒体认证的具体要求,提出了一种新的数字图象可恢复性主动签名方法(RADS)。采用RADS方法能近似地恢复被各种操作破坏了的数据,并能准确地定位被破坏的象素的位置,从而达到对数据的完整性和数据签发者的身份进行更高层次的主动认证。实验结果表明,RADS方法对数字图象各种类型的部分或全部替换、剪切都具有良好的可恢复性。

This paper presents a novel recoverable active signature technique of digital images(RADS) , according to the characteristics of image contents and the requirements of multimedia authentication. RADS can approximately recover the lost data modified by any kind of manipulation and can exactly detect the location of the altered areas so that it reaches a kind of active new and high authentication layer to verify the integrity of data and the endorser ' s ID. Experimental results show that the RADS method is a good recoverable authentication method for digital images which are cropped or replaced by all kinds of manipulations in part or fully.