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Robust AVS audio watermarking

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Science China(information Sciences) 2010年第3期53卷 607-618页

作者： WANG Yong & HUANG JiWu guangdong key laboratory of information {4. {4., School of information Science and {4., Sun Yat-Sen University, guangzhou 5102.5, China 1. guangdong key laboratory of information {4. {4. School of Information Science and Technology Sun Yat-Sen University Guangzhou 510275 China

Part Ⅲ of AVS (China Audio and Video Coding Standard) is the first generic audio standard proposed in China and is becoming popular in some applications. For MP3 audio, some effiorts have been made to solve the copyright pirating and malicious modifications by the way of watermarking. To our best knowledge, similar work on the AVS audio has not been explored. In this paper, we present a novel robust watermarking algorithm for AVS audio. We find that the frame type in the AVS coded process can be used as a robust feature for watermarking. Then we design a novel watermarking algorithm which is integrated into the AVS audio coding process. The watermark bits are embedded into the compressed bit stream. At the extracting end, the watermark bits can be extracted from the compressed bit stream directly. This algorithm achieves robustness to decoding/re-coding attacks, and has low computation complexity for both embedding and extracting while preserving the quality of the audio signals.

关键词： AVS audio security problems robust watermarking

A provable secure fuzzy identity based signature scheme

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Science China(information Sciences) 2012年第9期55卷 2139-2148页

作者： WANG ChangJi 1,2 1 School of information Science and technology,Sun Yat-sen University,guangzhou 5102.5,China {4. Province information security key laboratory,Sun Yat-sen University,guangzhou 5102.5,China 1. School of information Science and technology Sun Yat-sen University Guangzhou 510275 China2. Guangdong Province Information Security Key Laboratory Sun Yat-sen University Guangzhou 510275 China

To use biometrics identities in an identity based encryption system,Sahai and Waters first introduced the notion of fuzzy identity based encryption(FIBE) in *** et *** it to digital signature and introduced the concept of fuzzy identity based signature(FIBS) in 2008,and constructed an FIBS scheme based on Sahai and Waters's FIBE *** this paper,we further formalize the notion and security model of FIBS scheme and propose a new construction of FIBS scheme based on bilinear *** proposed scheme not only provides shorter public parameters,private key and signature,but also have useful structures which result in more efficient verification than that of Yang et al.'s FIBS *** proposed FIBS scheme is proved to be existentially unforgeable under a chosen message attack and selective fuzzy identity attack in the random oracle model under the discrete logarithm assumption.

关键词： identity based cryptosystem fuzzy identity based encryption fuzzy identity based signature

Steganalysis of stochastic modulation steganography

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Science in China(Series F) 2006年第3期49卷 273-285页

作者： HE Junhui1,2 & HUANG Jiwu1,2 1. School of information Science and technology, Sun Yat-sen University, guangzhou 5102.5, China 2. guangdong Province {4. {4. of information security, guangzhou 5102.5, China 1. School of information Science and technology Sun Yat-sen University Guangzhou 510275 China 2. guangdong Province key laboratory of information {4. Guangzhou 510275 China

Stochastic modulation steganography embeds secret message within the cover image by adding stego-noise with a specific probabilistic distribution. No method is known to be applicable to the estimation of stochastic modulation steganography. By analyzing the distributions of the horizontal pixel difference of images before and after stochastic modulation embedding, we present a new steganalytic approach to accurately estimate the length of secret message in stochastic modulation steganography. The pro- posed method first establishes a model describing the statistical relationship among the differences of the cover image, stego-image and stego-noise. In the case of stegoimage-only steganalysis, rough estimate of the distributional parameters of the cover image＇s pixel difference is obtained with the use of the provided stego-image. And grid search and Chi-square goodness of fit test are exploited to estimate the length of the secret message embedded with stochastic modulation steganography. The experimental results demonstrate that our new approach is effective for steganalyzing stochastic modulation steganography and accurately estimating the length of the secret message.

关键词： information hiding steganography steganalysis stochastic modulation statistical distribution models of difference.

Calibration based universal JPEG steganalysis

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Science in China(Series F) 2009年第2期52卷 260-268页

作者： HUANG FangJun1,2 & HUANG JiWu1,2 1 School of information Science and technology,Sun Yat-Sen University,guangzhou 5102.5,China {4. key Lab. of information security technology,Sun Yat-Sen University,guangzhou 5102.5,China School of information Science and technology Sun Yat-Sen University Guangzhou 510275 China guangdong key Lab. of information security {4. Sun Yat-Sen University Guangzhou 510275 China

For steganalysis of JPEG images, features derived in the embedding domain appear to achieve a preferable performance. However, with the existing JPEG steganography, the minor changes due to the hidden secret data are not easy to be explored directly from the quantized block DCT （BDCT） coefficients in that the energy of the carrier image is much larger than that of the hidden signal. In this paper, we present an improved calibration-based universal JPEG steganalysis, where the microscopic and macroscopic calibrations are combined to calibrate the local and global distribution of the quantized BDCT coefficients of the test image. All features in our method are generated from the difference signal be- tween the quantized BDCT coefficients of the test image and its corresponding microscopic calibrated image, or calculated as the difference between the signal extracted from test image and its corresponding macroscopic calibrated image. The extracted features will be more effective for our classification. Moreover, through using the Markov empirical transition matrices, both magnitude and sign dependencies along row scanning and column scanning patterns existed in intra-block and inter-block quantized BDCT coefficients are employed in our method. Experimental results demonstrate that our proposed scheme outperforms the best effective JPEG steganalyzers having been presented.

关键词： JPEG steganography steganalysis microscopic calibration macroscopic calibration

A Deniable Authenticated key Agreement Protocol

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Wuhan University Journal of Natural Sciences 2008年第6期13卷 645-650页

作者： TIAN Haibo1,2, CHEN Xiaofeng1,2, ZHANG Fangguo1,2, WEI Baodian1,2 1. School of information Science and technology, Sun Yat-Sen University, guangzhou 510006, guangdong, China 2. guangdong key laboratory of information security technology, Sun Yat-Sen University, guangzhou 5102.5, guangdong, China School of information Science and technology Sun Yat-Sen University Guangzhou 510006 Guangdong China guangdong key laboratory of information {4. {4. Sun Yat-Sen University Guangzhou 510275 Guangdong China

This paper presents a deniable authenticated key agreement protocol. This protocol can provide an authenticated session key while the sender and the receiver can deny their involvement in such a protocol if the protocol is executed successfully. Then both can deny their transmitted messages protected by the authenticated session key. If this protocol fails, no authenticated session key can be established and no protected messages can be transmitted. The protocol can be proved secure against key compromise impersonation attack. The protocol employs a new method to isolate a session key from confirmation keys.

关键词： deniable authentication key agreement key compromise impersonation

Perceptual video hashing robust against geometric distortions

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Science China(information Sciences) 2012年第7期55卷 1520-1527页

作者： XIANG ShiJun 1,4.,YANG JianQuan 2 & HUANG JiWu 3 1 School of information Science and technology,Jinan University,guangzhou 510632,China 2 Shenzhen Institutes of Advanced technology,Chinese Academy of Sciences,Shenzhen 518055,China 3 School of information Science and technology,Sun Yat-sen University,guangzhou 5102.5,China 4.State key laboratory of information security,Institute of Software,Chinese Academy of Sciences,Beijing 10004.,China 1. School of information Science and technology Jinan University Guangzhou 510632 China4. State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100049 China2. Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China3. School of Information Science and Technology Sun Yat-sen University Guangzhou 510275 China

In this paper,we propose a robust perceptual hashing algorithm by using video luminance histogram in *** underlying robustness principles are based on three main aspects:1) Since the histogram is independent of position of a pixel,the algorithm is resistant to geometric deformations; 2) the hash is extracted from the spatial Gaussian-filtering low-frequency component for those common video processing operations such as noise corruption,low-pass filtering,lossy compression,etc.; 3) a temporal Gaussian-filtering operation is designed so that the hash is resistant to temporal desynchronization operations,such as frame rate change and *** a result,the hash function is robust to common geometric distortions and video processing *** results show that the proposed hashing strategy can provide satisfactory robustness and uniqueness.

关键词： video hashing geometric distortion histogram Gaussian filtering

Quantum threshold group signature

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Science China(Physics,Mechanics & Astronomy) 2008年第10期51卷 1505-1514页

作者： YANG YuGuang1,2,3 & WEN QiaoYan4.1 College of Computer Science and technology, Beijing University of technology, Beijing 100124. China 2 State key laboratory of Integrated Services Network, Xidian University, Xi’an 710071, China 3 State key laboratory of {4. security (Graduate University of Chinese Academy of Sciences), Beijing 10004., China 4.State key laboratory of Networking and Switching technology, Beijing University of Posts and Tele-communications, Beijing 100876, China College of Computer Science and technology Beijing University of Technology Beijing 100124 China State key laboratory of Integrated Services Network Xidian University Xi’an 710071 China State key laboratory of information security Graduate University of Chinese Academy of Sciences Beijing 100049 China State key laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

In most situations, the signer is generally a single person. However, when the message is written on behalf of an organization, a valid message may require the approval or consent of several persons. Threshold signature is a solution to this problem. Generally speaking, as an authority which can be trusted by all members does not exist, a threshold signature scheme without a trusted party appears more attractive. Following some ideas of the classical Shamir’s threshold signature scheme, a quantum threshold group signature one is proposed. In the proposed scheme, only t or more of n persons in the group can generate the group signature and any t-1 or fewer ones cannot do that. In the verification phase, any t or more of n signature receivers can verify the message and any t-1 or fewer receivers cannot verify the validity of the signature.

关键词： threshold quantum signature trusted party quantum cryptography

Threshold proxy quantum signature scheme with threshold shared verification

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Science China(Physics,Mechanics & Astronomy) 2008年第8期51卷 1079-1088页

作者： YANG YuGuang1,3,4.& WEN QiaoYan2 1 College of Computer Science and technology,Beijing University of technology,Beijing 100124.China 2 State key laboratory of Networking and Switching technology,Beijing University of Posts and Tele-communications,Beijing 100876,China 3 State key laboratory of Integrated Services Network,Xidian University,Xi’an 710071,China 4.State key laboratory of information security(Graduate University of Chinese Academy of Sciences) ,Beijing 10004.,China 1. College of Computer Science and technology Beijing University of Technology Beijing 100124 China 3. State key laboratory of Integrated Services Network Xidian University Xi’an 710071 China 4. State key laboratory of information security (Graduate University of Chinese Academy of Sciences) Beijing 100049 China 2. State key laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold proxy quantum signature scheme with threshold shared verification is proposed. An original signer could authorize a group as its proxy signers. Then only t or more of n persons in the proxy group can generate the proxy signature on behalf of the original signer and any t-1 or fewer ones cannot do that. When the proxy signature needs to be verified,any t or more of n persons belonging to the verification group can verify the message and any t-1 or fewer ones cannot verify the validity of the proxy signature.

关键词： quantum signature threshold proxy quantum group signature threshold shared verification

Threshold quantum secret sharing between multi-party and multi-party

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Science China(Physics,Mechanics & Astronomy) 2008年第9期51卷 1308-1315页

作者： YANG YuGuang1,2,3 & WEN QiaoYan4.1 College of Computer Science and technology,Beijing University of technology,Beijing 100124.China 2 State key laboratory of Integrated Services Network,Xidian University,Xi’an 710071,China 3 State key laboratory of {4. security (Graduate University of Chinese Academy of Sciences),Beijing 10004.,China 4.State key laboratory of Networking and Switching technology,Beijing University of Posts and Tele-communications,Beijing 100876,China College of Computer Science and technology Beijing University of Technology Beijing 100124 China State key laboratory of Integrated Services Network Xidian University Xi’an 710071 China State key laboratory of information security (Graduate University of Chinese Academy of Sciences) Beijing 100049 China State key laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold quantum secret sharing (TQSS) scheme between multi-party and multi-party was proposed using a sequence of single photons,which is useful and efficient when the parties of communication are not all present. We described the process of this TQSS scheme and discussed its security. It was shown that entan-glement is not necessary for quantum secret sharing. Moreover,the theoretic effi-ciency was improved to approach 100% as almost all the instances can be used for generating the private key,and each photon can carry one bit of information. This protocol is feasible with the present-day technique.

关键词： threshold quantum secret sharing quantum cryptography single photon multi-party and multi-party