With the easy availability of cheap digital cameras and powerful image editing software, image forgery is becoming one of the most common cyber-crime. Image forgery is used not only for political, social or financial gain but also for defamation, harassment and also a part of various other cybercrimes. One of the most common types of image forgery is the copy-move forgery where a part of the im...

In this note we consider the problem of signature forgery by the signer in digital signature schemes based on the zero-knowledge concept and propose a simple method for obtaining security against such forgery without any increase of computation complexity.

COPA is a block-cipher-based authenticated encryption mode with a provable birthday-bound security under the assumption that the underlying block cipher is a strong pseudorandom permutation, and its instantiation with the AES block cipher is called AES-COPA. Marble is an AES-based COPA-like authenticated encryption algorithm with a full security. In this paper, we analyse the security of COPA a...

Powerful image editing tools are very common these days. By use of such tools, image tampering is also becoming common. It is becoming very common to remove or add some information on the images mostly for the purpose of some forgery. The focus of this paper is to detect “copy move” type of forgery. In this type of forgery, one portion of image is copied and pasted somewhere else in the same im...

In ancient times, images were used very rarely & there was a possibility of less amount of forgery or no forgery in images. It requires much knowledge to create a forged image earlier. Nowadays, Images have gained a very vital importance in our daily life and it is not very difficult to make forged images because of the availability of powerful digital image editing software’s that does not req...

With the widespread use of powerful image editing tools, the demand for identifying the authenticity of an image is much increased. Copy-move forgery is one of the most common and immediate tampering attacks, and is one type of image forgery where one region of an image is copied to another region in an attempt to cover some potentially important features. In this paper a Novel approach is pres...

Region duplication forgery detection is a special type of forgery detection approach and widely used research topic under digital image forensics. In copy move forgery, a specific area is copied and then pasted into any other region of the image. Due to the availability of sophisticated image processing tools, it becomes very hard to detect forgery with naked eyes. From the forged region of an ...

With the rapid development and popularization of Photoshop, ACDSee and other digital processing and editing software, the non-professionals can easily modify the image to achieve the purpose of beautification, spoof or malicious tampering. Digital tampering usually has ulterior motives, which would bring crisis of confidence to the credibility of media image, the authenticity of judicial eviden...

No. 02 www.jiaats.com JIAATS-JEEE Abstract— Copy-move image forgery is one of the tampering techniques that need to be tackled with. Many copy-move forgery detection techniques such as exhaustive search, block and key-point matching based methods have been proposed for the detection of copy-move image forgery. Although key-point based methods were found better than block based methods in terms ...