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The SHA-3 competition organized by NIST [1] aims to find a new hash standard as a replacement of SHA-2. Till now, 14 submissions have been selected as the second round candidates, including Skein and BLAKE, both of which have components based on modular addition, rotation and bitwise XOR (ARX). In this paper, we propose improved near-collision attacks on(More)
The Grøstl hash function is one of the 5 final round candidates of the SHA-3 competition hosted by NIST. In this paper, we study the preimage resistance of the Grøstl hash function. We propose pseudo preimage attacks on Grøstl hash function for both 256-bit and 512-bit versions, i.e., we need to choose the initial value in order to invert the hash function.(More)
The Grøstl hash function is one of the 5 final round candidates of the SHA-3 competition hosted by NIST. In this paper, we study the preimage resistance of the Grøstl hash function. We propose pseudo preimage attacks on Grøstl hash function for both 256-bit and 512-bit versions, i.e., we need to choose the initial value in order to invert the hash function.(More)
This paper shows the feasibility of noise extraction from noisy speech and presents a two-stage approach for speech enhancement. The preproposed mean square cross prediction error (MSCPE) based blind source extraction algorithm is utilized to extract the additive noise from the noisy speech signal in the first stage. After that a modified spectral(More)
The mismatch between the Low Dynamic Range (LDR) content and the High Dynamic Range (HDR) display arouses the research on inverse tone mapping algorithms. In this paper, we present a physiological inverse tone mapping algorithm inspired by the property of the Human Visual System (HVS). It first imitates the retina response and deduce it to be local(More)
Content-based image retrieval system needs a feature vector with dimensionality as lower as possible. In this paper, we propose an image retrieval system using low-dimensional color feature vector containing only one image feature termed as weighted average of colorful image. For finding similar images, the euclidean distance between the feature vector of(More)
BACKGROUND AND AIM Ulcerative colitis (UC) refers to a kind of inflammatory bowel disease, of which the accurate pathogenesis is not yet well understood. Recently, the toll-like receptor 4 (TLR4) and the TLR4 signaling pathway have been proved as playing an important role in the pathogenesis of UC. The objective of this study was to evaluate the effect of(More)
BACKGROUND AND AIM The accurate pathogenesis of ulcerative colitis (UC) is not yet well understood. Recently, Toll-like receptor 2 (TLR2), TLR4 and gut microbial flora have been proved as playing important roles in the process of UC. This study was to evaluate the effect of TLR2 and TLR4 monoclonal antibodies on gut microbial flora in dextran sulfate sodium(More)