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.
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）。
We consider the problem of digital watermarking for credibility authentication or tamper proofing of multimedia.
讨论了多媒体信息可靠性鉴定的数字水印方法，可靠性鉴定也称为篡改证明。
With the superiority in the field of the copyright protection in multimedia and the authentication of media, the technology of digital watermarking is becoming one of the hot-spots.
数字水印技术因其在多媒体版权保护、媒体认证技术方面所具有的优势，逐渐成为人们研究的热点之一。
With the development of computer network and multimedia technology, copyright protection and authentication become more and more urgent.
随着多媒体技术和网络技术的飞速发展和广泛应用，版权保护和安全认证成了迫切需要的问题。
In this paper, an analysis of the procedure and security of IMS (Internet protocol multimedia subsystem) authentication and key agreement protocol has been made.
本文分析了IMS认证与密钥分配协议的过程，找出了认证协议中的安全缺陷，并给出了攻击者可能进行的攻击。
In this paper, an analysis of the procedure and security of IMS (Internet protocol multimedia subsystem) authentication and key agreement protocol has been made.
本文分析了IMS认证与密钥分配协议的过程，找出了认证协议中的安全缺陷，并给出了攻击者可能进行的攻击。
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