Add to ORKGA semi fragile, public key based digital signature scheme to verify and authenticate digital images is proposed. The scheme computes a content dependent feature value for each block of DCT coefficients of the original image. This feature is signed and then embedded into the selected DCT coefficients of the image as watermark. The technique aims to circumvent the cut and paste attacks by incorporating inter block dependence during the watermarking procedure. The watermarked image demonstrated high perceptual quality and robustness. It also proved to be robust against many common image processing operations and JPEG compression. The scheme not only can verify the authenticity and the integrity of images, but also can locate the illegal modifi...
This chapter is intended to disseminate the concept of digital signature-based image authentication....
Image watermarking is most often used to prove that an image belongs to someone and to make sure tha...
The security of digital media content has received significant attention as the usage of multimediah...
In this paper, a novel semi-fragile watermarking scheme for image authentication is proposed, which ...
Abstract. The digital watermark technology is now drawing the attention as a new method of protectin...
Abstract—The development of computers and Internet has exploded in the last few years. The digital i...
The digital signature and watermarking methods are used for image authentication. Digital signature ...
Techniques to establish the authenticity and integrity of digital images are becom-ing increasingly ...
The paper examines watermarking and digital signature based approaches for image authentication. It ...
Feature-based watermark is a special kind of watermark, which reflects the features of the content, ...
Abstract—In [1, 2, 3], we have introduced a robust and secure digital signature solution for multime...
Image content authentication is to verify the integrity of the images, i.e. to check if the image ha...
[[abstract]]Computer network and digitized information, which bring the convenience of spreading and...
This paper proposes a novel semi-fragile watermarking scheme, which is robust against regular manipu...
Abstract—The existing digital data verification methods are able to detect regions that have been ta...
This chapter is intended to disseminate the concept of digital signature-based image authentication....
Image watermarking is most often used to prove that an image belongs to someone and to make sure tha...
The security of digital media content has received significant attention as the usage of multimediah...
In this paper, a novel semi-fragile watermarking scheme for image authentication is proposed, which ...
Abstract. The digital watermark technology is now drawing the attention as a new method of protectin...
Abstract—The development of computers and Internet has exploded in the last few years. The digital i...
The digital signature and watermarking methods are used for image authentication. Digital signature ...
Techniques to establish the authenticity and integrity of digital images are becom-ing increasingly ...
The paper examines watermarking and digital signature based approaches for image authentication. It ...
Feature-based watermark is a special kind of watermark, which reflects the features of the content, ...
Abstract—In [1, 2, 3], we have introduced a robust and secure digital signature solution for multime...
Image content authentication is to verify the integrity of the images, i.e. to check if the image ha...
[[abstract]]Computer network and digitized information, which bring the convenience of spreading and...
This paper proposes a novel semi-fragile watermarking scheme, which is robust against regular manipu...
Abstract—The existing digital data verification methods are able to detect regions that have been ta...
This chapter is intended to disseminate the concept of digital signature-based image authentication....
Image watermarking is most often used to prove that an image belongs to someone and to make sure tha...
The security of digital media content has received significant attention as the usage of multimediah...