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A new framelet-based random walks (RWs) method is presented for synthetic aperture radar (SAR) image fusion, including SAR-visible images, SAR-infrared images, and Multi-band SAR images. In this method, we build a novel RWs model based on the statistical characteristics of framelet coefficients to fuse the high-frequency and low-frequency coefficients. This model converts the fusion problem to estimate...
In the paper, a new blind image steganalysis scheme for JPEG image steganography is proposed. Space filling curve is exploited to scan quantized block DCT coefficients. Markov model is applied to model the dependencies between quantized DCT cofficients so as to extract intrablock and interblock transition probability matrices. The experiments on F5, Steghide and MB1 steganography show the method can...
HCC (Hyper-elliptic Curves Cryptosystem) is a typical fast public key cryptosystem; it has much superiority in security and application efficiency. We introduced HCC into the designing and analyzing of blind signature, and presented an improved blind signature scheme based on HCC. By utilizing probabilistic encryption and blinding algorithm, the entrusted signer has no knowledge of the message while...
The security threats and system weakness of present digital fingerprint schemes were analyzed. Combining blind signature and digital fingerprint, an asymmetric digital fingerprint scheme with conditional anonymity based on elliptic curves cryptosystem was presented. The probabilistic encryption algorithm and identity blinding process enable the buyer to be conditionally anonymous in fingerprint embedding...
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