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Multiple Perspective ofMultipredictorMechanism andMultihistogram Modification for High-Fidelity Reversible Data Hiding

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Computer Systems Science & Engineering 2024年第3期48卷 813-833页

作者： Kai Gao chin-chen chang Chia-chen Lin Department of Information Engineering and Computer Science Feng Chia UniversityTaichung407Taiwan Department of Computer Science and Information Engineering National Chin-Yin University of TechnologyTaichung411Taiwan

Reversible data hiding is a confidential communication technique that takes advantage of image file characteristics,which allows us to hide sensitive data in image *** this paper,we propose a novel high-fidelity reversible data hiding *** on the advantage of the multipredictor mechanism,we combine two effective prediction schemes to improve prediction *** addition,the multihistogram technique is utilized to further improve the image quality of the stego ***,a model of the grouped knapsack problem is used to speed up the search for the suitable embedding bin in each *** results show that the quality of the stego image of our scheme outperforms state-of-the-art schemes in most cases.

关键词： Data hiding multipredictor mechanism high-fidelity knapsack problem

A Steganography Based on Optimal Multi-Threshold Block Labeling

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Computer Systems Science & Engineering 2023年第1期44卷 721-739页

作者： Shuying Xu chin-chen chang Ji-Hwei Horng Department of Information Engineering and Computer Science Feng Chia UniversityTaichung407Taiwan Department of Electronic Engineering National Quemoy UniversityKinmen892Taiwan

Hiding secret data in digital images is one of the major researchfields in information ***,reversible data hiding in encrypted images has attracted extensive attention due to the emergence of cloud *** paper proposes a novel reversible data hiding method in encrypted images based on an optimal multi-threshold block labeling technique(OMTBL-RDHEI).In our scheme,the content owner encrypts the cover image with block permutation,pixel permutation,and stream cipher,which preserve the in-block correlation of pixel *** uploading to the cloud service,the data hider applies the prediction error rearrangement(PER),the optimal threshold selection(OTS),and the multi-threshold labeling(MTL)methods to obtain a compressed version of the encrypted image and embed secret data into the vacated *** receiver can extract the secret,restore the cover image,or do both according to his/her granted *** proposed MTL labels blocks of the encrypted image with a list of threshold values which is optimized with OTS based on the features of the current *** results show that labeling image blocks with the optimized threshold list can efficiently enlarge the amount of vacated room and thus improve the embedding capacity of an encrypted cover *** level of the proposed scheme is analyzed and the embedding capacity is compared with state-of-the-art *** are concluded with satisfactory performance.

关键词： Reversible data hiding encryption image prediction error compression multi-threshold block labeling

High glucose reduces Nrf2-dependent cRAGE release and enhances inflammasome-dependent IL-1βproduction in monocytes:the modulatory effects of EGCG

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Food Science and Human Wellness 2024年第3期13卷 1531-1542页

作者： Chi-Hao Wu Yin-Hsuan chang chin-Lin Hsu Sheng-Yi chen Gow-chin Yen Graduate Programs of Nutrition Science School of Life ScienceTaiwan Normal UniversityTaipei 106209TaiwanChina Department of Food Science and Biotechnology Chung Hsing UniversityTaichung 40227TaiwanChina School of Nutrition Chung Shan Medical UniversityTaichung 40201TaiwanChina

Soluble receptor for advanced glycation end products(sRAGE)acts as a decoy sequestering of RAGE ligands,thus preventing the activation of the ligand-RAGE axis linking human ***,the molecular mechanisms underlying sRAGE remain *** this study,THP-1 monocytes were cultured in normal glucose(NG,5.5 mmol/L)and high glucose(HG,15 mmol/L)to investigate the effects of diabetesrelevant glucose concentrations on sRAGE and interleukin-1β(IL-1β)*** modulatory effects of epigallocatechin gallate(EGCG)in response to HG challenge were also *** enhanced intracellular reactive oxygen species(ROS)generation and RAGE *** secretion of sRAGE,including esRAGE and cRAGE,was reduced under HG conditions,together with the downregulation of a disintegrin and metallopeptidase 10(ADAM10)and nuclear factor erythroid 2-related factor 2(Nrf2)nuclear ***,the HG effects were counteracted by siRAGE and exacerbated by *** immunoprecipitation results showed that Nrf2 binding to the ADAM10 promoter and HG interfered with this *** data reinforce the notion that RAGE and Nrf2 might be sRAGE-regulating *** HG conditions,the treatment of EGCG reduced ROS generation and RAGE ***-stimulated cRAGE release was likely caused by the upregulation of the Nrf2-ADAM10 *** inhibited HG-mediated NLRP3 inflammasome activation at least partly by stimulating sRAGE,thereby reducing IL-1βrelease.

关键词： Epigallocatechin gallate(EGCG) Inflammasome Nuclear factor erythroid 2-related factor 2(Nrf2) Receptor for advanced glycation end products(RAGE) Soluble RAGE(sRAGE)

High-Imperceptibility Data Hiding Scheme for JPEG Images Based on Direction Modification

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Computer Systems Science & Engineering 2023年第11期47卷 1415-1431页

作者： Li Liu Jing Li Yingchun Wu chin-chen chang Anhong Wang College of Electronic Information and Engineering Taiyuan University of Science and TechnologyTaiyuan030024China Department of Information Engineering and Computer Science Feng Chia UniversityTaichung40724Taiwan

Data hiding(DH)is an important technology for securely transmitting secret data in networks,and has increasing become a research hotspot throughout the ***,for Joint photographic experts group(JPEG)images,it is difficult to balance the contradiction among embedded capacity,visual quality and the file size increment in existing data hiding ***,to deal with this problem,a high-imperceptibility data hiding for JPEG images is proposed based on direction ***,this proposed scheme sorts all of the quantized discrete cosine transform(DCT)block in ascending order according to the number of non-consecutive-zero alternating current(AC)*** it selects non-consecutive-zero AC coefficients with absolute values less than or equal to 1 at the same frequency position in two adjacent blocks for ***,the 2-bit secret data can be embedded into a coefficient-pair by using the filled reference matrix and the designed direction modification *** experiment was conducted on 5 standard test images and 1000 images of BOSSbase dataset,*** experimental results showed that the visual quality of the proposed scheme was improved by 1∼4 dB compared with the comparison schemes,and the file size increment was reduced at most to 15%of the comparison schemes.

关键词： Data hiding JPEG images coefficient-pair direction modification file size increment

Privacy-Preserving Algorithms for Multiple Sensitive Attributes Satisfying t-Closeness

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Journal of Computer Science & Technology 2018年第6期33卷 1231-1242页

作者： Rong Wang Yan Zhu Tung-Shou chen chin-chen chang School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China Department of Computer Science and Information Engineering "National" Taichung University of Science and Technology Taichung 404 China Department of Information Engineering and Computer Science Feng Chia University Taichung 40724 China

Although k-anonymity is a good way of publishing microdata for research purposes, it cannot resist severalcommon attacks, such as attribute disclosure and the similarity attack. To resist these attacks, many refinements of k-anonymity have been proposed with t-closeness being one of the strictest privacy models. While most existing t-closenessmodels address the case in which the original data have only one single sensitive attribute, data with multiple sensitiveattributes are more common in practice. In this paper, we cover this gap with two proposed algorithms for multiple sensitiveattributes and make the published data satisfy t-closeness. Based on the observation that the values of the sensitive attributesin any equivalence class must be as spread as possible over the entire data to make the published data satisfy t-closeness,both of the algorithms use different methods to partition records into groups in terms of sensitive attributes. One uses aclustering method, while the other leverages the principal component analysis. Then, according to the similarity of quasi-identifier attributes, records are selected from different groups to construct an equivalence class, which will reduce the lossof information as much as possible during anonymization. Our proposed algorithms are evaluated using a real dataset. Theresults show that the average speed of the first proposed algorithm is slower than that of the second proposed algorithm butthe former can preserve more original information. In addition, compared with related approaches, both proposed algorithmscan achieve stronger protection of privacy and reduce less.

关键词： data privacy k-anonymity t-closeness multiple sensitive attribute

Fast Image Coding Algorithm Using Indirect-Index Codebook Based on SMVQ

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Journal of Electronic Science and Technology 2016年第2期14卷 183-190页

作者： Bin-Bin Xia An-Hong Wang chin-chen chang Li Liu College of Electronic Information and Engineering Taiyuan University of Science and TechnologyTaiyuan Department of Information Engineering and Computer Science Feng Chia University

Side-match vector quantization （SMVQ） achieves better compression performance than vector quantization （VQ） in image coding due to its exploration of the dependence of adjacent pixels. However, SMVQ has the disadvantage of requiring excessive time during the process of coding. Therefore, this paper proposes a fast image coding algorithm using indirect-index codebook based on SMVQ （IIC-SMVQ） to reduce the coding time. Two codebooks, named indirect-index codebook （II-codebook） and entire-state codebook （ES-codebook）, are trained and utilized. The II-codebook is trained by using the Linde-Buzo-Gray （LBG） algorithm from side-match information, while the ES-codebook is generated from the clustered residual blocks on the basis of the II-codebook. According to the relationship between these two codebooks, the codeword in the II-codebook can be regarded as an indicator to construct a fast search path, which guides in quickly determining the state codebook from the ES-codebook to encode the to-be-encoded block. The experimental results confirm that the coding time of the proposed scheme is shorter than that of the previous SMVQ.

关键词： Entire-state codebook indirect-indexcodebook Linde-Bnzo-Gray side-match vectorquantization.

3D Multilayered Turtle Shell Models for Image Steganography

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Computer Modeling in Engineering & Sciences 2020年第11期124卷 879-906页

作者： Ji-Hwei Horng Juan Lin Yanjun Liu chin-chen chang Quemoy University Kinmen County892TaiwanChina Engineering Research Center for ICH Digitalization and Multi-Source Information Fusion Fuqing Branch of Fujian Normal UniversityFujian Province UniversityFuzhou350300China Department of Information Engineering and Computer Science Feng Chia UniversityTaichung40724TaiwanChina School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China

By embedding secret data into cover images,image steganography can produce non-discriminable *** turtle shell model for data hiding is an excellent method that uses a reference matrix to make a good balance between image quality and embedding ***,increasing the embedding capacity by extending the area of basic structures of the turtle shell model usually leads to severe degradation of image *** this research,we innovatively extend the basic structure of the turtle shell model into a three-dimensional(3D)*** intrinsic properties of the original turtle shell model are well preserved in the 3D *** analysis shows that the new proposed models have good performance both in the image quality and in the complexity of the reference *** experimental results justify the theoretic conclusions.

关键词： 3D turtle shell data hiding reference matrix image quality

Protecting User Privacy in a Multi-Path Information-Centric Network Using Multiple Random-Caches

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Journal of Computer Science & Technology 2017年第3期32卷 585-598页

作者： Wei-Bo Chu Li-Fang Wang Ze-Jun Jiang chin-chen chang School of Computer Science and Technology Northwestern Polytechnical University Xi'an 710072 China Department of Information Engineering and Computer Science Feng Chia University Taichung Taiwan 40724 China

In-network caching is a fundamental mechanism advocated by information-centric networks （ICNs） for efficient content delivery. However, this new mechanism also brings serious privacy risks due to cache snooping attacks. One effective solution to this problem is random-cache, where the cache in a router randomly mimics a cache hit or a cache miss for each content request/probe. In this paper, we investigate the effectiveness of using multiple random-caches to protect cache privacy in a multi-path ICN. We propose models for characterizing the privacy of multi-path ICNs with random-caches, and analyze two different attack scenarios： 1） prefix-based attacks and 2） suffix-based attacks. Both homogeneous and heterogeneous caches are considered. Our analysis shows that in a multi-path ICN an adversary can potentially gain more privacy information by adopting prefix-based attacks. Furthermore, heterogeneous caches provide much better privacy protection than homogeneous ones under both attacks. The effect of different parameters on the privacy of multi-path random-caches is further investigated, and the comparison with its single-path counterpart is carried out based on numerical evaluations. The analysis and results in this paper provide insights in designing and evaluating multi-path ICNs when we take privacy into consideration.

关键词： information-centric network (ICN) user privacy cache snooping random-cache multi-path

A proactive secret sharing scheme based on chinese remainder theorem

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Frontiers of Computer Science 2021年第2期15卷 133-142页

作者： Keju MENG Fuyou MIAO Yu NING Wenchao HUANG Yan XIONG chin-chen chang School of Computer Science and Technology University of Science and Technology of ChinaHefei230026China Department of Information Engineering and Computer Science Feng Chia UniversityTaichung40724China School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China

If an adversary tries to obtain a secret s in a(t,n)threshold secret sharing(SS)scheme,it has to capture no less than t shares instead of the secret s ***,if a shareholder keeps a fixed share for a long time,an adversary may have chances to filch some shareholders’*** a proactive secret sharing(PSS)scheme,shareholders are supposed to refresh shares at fixed period without changing the *** this way,an adversary can recover the secret if and only if it captures at least t shares during a period rather than any time,and thus PSS provides enhanced protection to long-lived *** existing PSS schemes are almost based on linear SS but no chinese Remainder Theorem(CRT)-based PSS scheme was *** paper proposes a PSS scheme based on CRT for integer ring to analyze the reason why traditional CRT-based SS is not suitable to design PSS ***,an ideal PSS scheme based on CRT for polynomial ring is also *** scheme utilizes isomorphism of CRT to implement efficient share refreshing.

关键词： proactive secret sharing chinese remainder theorem polynomial ring integer ring isomorphism