A public verifiable copy protection technique for still images. - Wei-Bin Lee; Tzungher Chen (J. Syst. Softw., 2002)

Secure SAS-like password authentication schemes. - Tzungher Chen; Wei-Bin Lee; Gwoboa Horng (Comput. Stand. Interfaces, 2004)

Distortion-Aware Multimedia Authentication using an Enhanced Hash Function. - Dahua Xie; Tzung-Her Chen; C.-C. Jay Kuo (MMSP, 2005)

Remarks on some signature schemes based on factoring and discrete logarithms. - Tzungher Chen; Wei-Bin Lee; Gwoboa Horng (Appl. Math. Comput., 2005)

A publicly verifiable copyright-proving scheme resistant to malicious attacks. - Tzungher Chen; Gwoboa Horng; Wei-Bin Lee (IEEE Trans. Ind. Electron., 2005)

Cheating in Visual Cryptography. - Gwoboa Horng; Tzungher Chen; Du-shiau Tsai (Des. Codes Cryptogr., 2006)

Owner-customer right protection mechanism using a watermarking scheme and a watermarking protocol. - Tzungher Chen; Du-shiau Tsai (Pattern Recognit., 2006)

Security enhancement of a novel proxy key generation protocol. - Chiung-Chou Tsai; Kuan-Chieh Liao; Tzungher Chen; Wei-Bin Lee (COMPSAC (2), 2007)

A Novel Subliminal Channel Found in Visual Cryptography and Its Application to Image Hiding. - Tzungher Chen; Chang-Sian Wu; Wei-Bin Lee (IIH-MSP, 2007)

A lightweight and anonymous copyright-protection protocol. - Tzungher Chen; Gwoboa Horng (Comput. Stand. Interfaces, 2007)

A Secure YS-Like User Authentication Scheme. - Tzungher Chen; Gwoboa Horng; Ke-Chiang Wu (Informatica, 2007)

A cheating prevention scheme for binary visual cryptography with homogeneous secret images. - Du-shiau Tsai; Tzungher Chen; Gwoboa Horng (Pattern Recognit., 2007)

Assigning Keys in a Hierarchy. - Jieh-Shan Yeh; Shang-Ru Yang; Chin-Chen Chang 001; Tzungher Chen (IIH-MSP, 2008)

Multiple-Image Encryption by Rotating Random Grids. - Tzung-Her Chen; Kai-Hsiang Tsao; Kuo-Chen Wei (ISDA (3), 2008)

A new method for using hash functions to solve remote user authentication. - Tzungher Chen; Wei-Bin Lee (Comput. Electr. Eng., 2008)

Security enhancement for a three-party encrypted key exchange protocol against undetectable on-line password guessing attacks. - Hsing-Bai Chen; Tzungher Chen; Wei-Bin Lee; Chin-Chen Chang 001 (Comput. Stand. Interfaces, 2008)

Public Key Authentication Schemes for Local Area Networks. - Tzungher Chen; Gwoboa Horng; Chuan-Sheng Yang (Informatica, 2008)

A round- and computation-efficient three-party authenticated key exchange protocol. - Tzungher Chen; Wei-Bin Lee; Hsing-Bai Chen (J. Syst. Softw., 2008)

Yet Another Friendly Progressive Visual Secret Sharing Scheme. - Tzung-Her Chen; Yao-Sheng Lee (IIH-MSP, 2009)

Medical Video Encryption Based on H.264/AVC with Near-Lossless Compression. - Tzung-Her Chen; Yan-Ting Wu; Yue-Rong Lin (IIH-MSP, 2009)

A self-verification authentication mechanism for mobile satellite communication systems. - Tzungher Chen; Wei-Bin Lee; Hsing-Bai Chen (Comput. Electr. Eng., 2009)

On the security of a copyright protection scheme based on visual cryptography. - Tzungher Chen; Chin-Chen Chang 001; Chang-Sian Wu; Der-Chyuan Lou (Comput. Stand. Interfaces, 2009)

Preventing Cheating in Computational Visual Cryptography. - Chin-Chen Chang 001; Tzungher Chen; Li-Jen Liu (Fundam. Informaticae, 2009)

Friendly Color Visual Secret Sharing by Random Grids. - Tzung-Her Chen; Kai-Hsiang Tsao; Yan-Ting Yang (Fundam. Informaticae, 2009)

A novel secret image sharing scheme for true-color images with size constraint. - Du-shiau Tsai; Gwoboa Horng; Tzungher Chen; Yao-Te Huang (Inf. Sci., 2009)

A Practical and Efficient Electronic Checkbook. - Tzungher Chen; Shu-Chen Yeh; Kuan-Chieh Liao; Wei-Bin Lee (J. Organ. Comput. Electron. Commer., 2009)

Visual secret sharing by random grids revisited. - Tzung-Her Chen; Kai-Hsiang Tsao (Pattern Recognit., 2009)

High-Capacity Multi-secret Sharing by Random Grid. - Tzung-Her Chen; Yao-Sheng Lee; Ci-Lin Li (BWCCA, 2010)

Noise-Resistant Joint Fingerprinting and Decryption Based on Vector Quantization. - Chih-Yang Lin; Wei-Lun Huang; Tzung-Her Chen (BWCCA, 2010)

Chaos-Based Image Integrity Authentication Code. - Tzung-Her Chen; Wei-Lun Huang; Chih-Yang Lin (IIH-MSP, 2010)

Compression-unimpaired batch-image encryption combining vector quantization and index compression. - Tzungher Chen; Chang-Sian Wu (Inf. Sci., 2010)

A novel user-participating authentication scheme. - Tzung-Her Chen; Jyun-Ci Huang (J. Syst. Softw., 2010)

A new protocol of wide use for e-mail with perfect forward secrecy. - Tzung-Her Chen; Yan-Ting Wu (J. Zhejiang Univ. Sci. C, 2010)

Threshold visual secret sharing by random grids. - Tzung-Her Chen; Kai-Hsiang Tsao (J. Syst. Softw., 2011)

Efficient multi-secret image sharing based on Boolean operations. - Tzungher Chen; Chang-Sian Wu (Signal Process., 2011)

User-Friendly Random-Grid-Based Visual Secret Sharing. - Tzung-Her Chen; Kai-Hsiang Tsao (IEEE Trans. Circuits Syst. Video Technol., 2011)

Multi-image encryption by circular random grids. - Tzung-Her Chen; Kuang-Che Li (Inf. Sci., 2012)

Yet another multiple-image encryption by rotating random grids. - Tzung-Her Chen; Kai-Hsiang Tsao; Yao-Sheng Lee (Signal Process., 2012)

Insight into collusion attacks in random-grid-based visual secret sharing. - Yao-Sheng Lee; Tzung-Her Chen (Signal Process., 2012)

Joint fingerprinting and decryption with noise-resistant for vector quantization images. - Chih-Yang Lin; Panyaporn Prangjarote; Li-Wei Kang; Wei-Lun Huang; Tzung-Her Chen (Signal Process., 2012)

Dynamic range optimization by flexible local contrast enhancement using luminance map. - Chih-Hung Lin; Shu-Yuan Lin; Tzung-Her Chen (ICDIP, 2013)

Robust Watermarking for Multiple Images and Users Based on Visual Cryptography. - Sheng-Shiang Chang; Chih-Hung Lin; Tzung-Her Chen; Kai-Siang Lin (ICGEC, 2013)

A Tailor-Made Encryption Scheme for High-Dynamic Range Images. - Kai-Siang Lin; Tzung-Her Chen; Chih-Hung Lin; Sheng-Shiang Chang (ICGEC, 2013)

Encryption in High Dynamic Range Images for RGBE Format. - Jing-Ya Yan; Tzung-Her Chen; Chih-Hung Lin (IIH-MSP, 2013)

A random grid-based cyclic access structure VSS scheme for multiple secret images. - Tzung-Her Chen; Bing-Jian Wang; Yao-Sheng Lee (Displays, 2013)

Color image authentication with tamper detection and remedy based on BCH and Bayer Pattern. - Chih-Hung Lin; Tzung-Her Chen; Chun-Wei Chiu (Displays, 2013)

Quality-improved threshold visual secret sharing scheme by random grids. - Yao-Sheng Lee; Bing-Jian Wang; Tzung-Her Chen (IET Image Process., 2013)

Quality-adaptive visual secret sharing by random grids. - Tzung-Her Chen; Yao-Sheng Lee; Wei-Lun Huang; Justie Su-tzu Juan; Ying-Yu Chen; Ming-Jheng Li (J. Syst. Softw., 2013)

A batch image encryption scheme based on chaining random grids. - Chih-Hung Lin; Tzung-Her Chen; Chang-Sian Wu (Sci. Iran., 2013)

A security-enhanced key agreement protocol based on chaotic maps. - Tzung-Her Chen; Bing-Jian Wang; Tai-Yuan Tu; Chih-Hung Wang (Secur. Commun. Networks, 2013)

An S/Key-like One-Time Password Authentication Scheme Using Smart Cards for Smart Meter. - Wei-Bin Lee; Tzungher Chen; Wei-Rung Sun; Kevin I.-J. Ho (AINA Workshops, 2014)

Tattooing Attack: A New Type of Watermarking Attacks on Image Authentication. - Jia-Hong Li; Tzungher Chen; Wei-Bin Lee (Int. J. Digit. Crime Forensics, 2014)

Distortionless visual multi-secret sharing based on random grid. - Kai-Siang Lin; Chih-Hung Lin; Tzung-Her Chen (Inf. Sci., 2014)

Multi-factor cheating prevention in visual secret sharing by hybrid codebooks. - Chih-Hung Lin; Tzung-Her Chen; Yan-Ting Wu; Kai-Hsiang Tsao; Kai-Siang Lin (J. Vis. Commun. Image Represent., 2014)

Visual multiple-secret sharing for flexible general access structure by random grids. - Kai-Hsiang Tsao; Shyong Jian Shyu; Chih-Hung Lin; Yao-Sheng Lee; Tzung-Her Chen (Displays, 2015)

Efficient Compression-Jointed Quality Controllable Scrambling Method for H.264/SVC. - Ci-Lin Li; Chih-Yang Lin; Tzung-Her Chen (Int. J. Netw. Secur., 2015)

Friendly progressive random-grid-based visual secret sharing with adaptive contrast. - Chih-Hung Lin; Yao-Sheng Lee; Tzung-Her Chen (J. Vis. Commun. Image Represent., 2015)

Cryptanalysis and improvement of two hyper-chaos-based image encryption schemes. - Fuh-Gwo Jeng; Wei-Lun Huang; Tzung-Her Chen (Signal Process. Image Commun., 2015)

An Improved Anonymous Buyer-Reseller Watermarking Protocol. - Fuh-Gwo Jeng; Jyun-Ci Huang; Tzung-Her Chen (Int. J. Netw. Secur., 2016)

On the Security of Privacy-preserving Keyword Searching for Cloud Storage Services. - Fuh-Gwo Jeng; Shu-Yuan Lin; Bing-Jian Wang; Chih-Hung Wang; Tzung-Her Chen (Int. J. Netw. Secur., 2016)

A multi-watermarking protocol for health information management. - Fuh-Gwo Jeng; Yan-Ting Wu; Tzung-Her Chen (Multim. Tools Appl., 2016)

On the difficulty of aligning VSS random grids. - Tzung-Her Chen; Yao-Sheng Lee; Chih-Hung Lin (Signal Process. Image Commun., 2016)

A Novel Weighted Visual Cryptography Scheme with High Visual Quality. - I-Chun Weng; Tzung-Her Chen (Int. J. Netw. Secur., 2017)

A new buyer-seller watermarking protocol without multiple watermarks insertion. - Jyun-Ci Huang; Fuh-Gwo Jeng; Tzung-Her Chen (Multim. Tools Appl., 2017)

A Weighted Threshold Visual Cryptography. - Tai-Yuan Tu; Tzung-Her Chen; Ji-Min Yang; Chih-Hung Wang (ICS, 2018)

On the security of a BTC-based-compression image authentication scheme. - Tzung-Her Chen; Tzu-Ching Chang (Multim. Tools Appl., 2018)

A novel DRM scheme for accommodating expectations of personal use. - Hsing-Bai Chen; Wei-Bin Lee; Tzungher Chen (Multim. Tools Appl., 2018)

On the design of a two-decoding-option image secret sharing scheme. - Tzung-Her Chen; Kai-Siang Lin; Chih-Hung Lin (Multim. Tools Appl., 2018)

Secure and efficient protection for HTTP cookies with self-verification. - Wei-Bin Lee; Hsing-Bai Chen; Shun-Shyan Chang; Tzungher Chen (Int. J. Commun. Syst., 2019)

On the security of threshold random grid-based visual secret sharing. - Bing-Jian Wang; Tzer-Shyong Chen; Fuh-Gwo Jeng; Tzung-Her Chen (Multim. Tools Appl., 2019)

Multiple secret image sharing with general access structure. - Tzung-Her Chen; Xi-Wen Wu (Multim. Tools Appl., 2020)

A Patient-Centric Key Management Protocol for Healthcare Information System based on Blockchain. - Ting-Le Zhu; Tzung-Her Chen (DSC, 2021)

Security-enhanced cloud-based image secret sharing and authentication using POB number system. - Tzung-Her Chen; Tzu-Ching Chang; Ting-Le Zhu (Multim. Tools Appl., 2021)

Commutative encryption and authentication for OpenEXR high dynamic range images. - Tzung-Her Chen; Jing-Ya Yan (Multim. Tools Appl., 2021)

Blockchain as a CA: A Provably Secure Signcryption Scheme Leveraging Blockchains. - Tzung-Her Chen; Ting-Le Zhu; Fuh-Gwo Jeng; Chien-Lung Wang (Secur. Commun. Networks, 2021)

Revisited - The Subliminal Channel in Blockchain and Its Application to IoT Security. - Tzung-Her Chen; Wei-Bin Lee; Hsing-Bai Chen; Chien-Lung Wang (Symmetry, 2021)

New Secure and Practical E-Mail Protocol with Perfect Forward Secrecy. - Chien-Ding Lee; Tzung-Her Chen (Symmetry, 2021)

Medical cooperative authenticated key agreement schemes with involvement of personal care assistant in telemedicine. - Chien-Ding Lee; Zhen-Hong Liao; Tzung-Her Chen (Comput. Methods Programs Biomed., 2022)

A Security-enhanced Steganography Scheme for RGBE-format HDR Images. - Tzung-Her Chen; Jing-Ya Yan (IIAI-AAI, 2023)

A Blockchain-Enabled Authentication and Conserved Data Aggregation Scheme for Secure Smart Grids. - Chien-Ding Lee; Jhih-Hong Li; Tzung-Her Chen (IEEE Access, 2023)

Multiparty Quantum Key Agreement Protocol Based on 2-Qubit Grover Search with swapping. - Tzung-Her Chen (IIAI-AAI, 2024)

Security enhancement of an (n, n) threshold non-expansible XOR-based visual cryptography with unique meaningful shares. - Xi-Wen Wu; Tzung-Her Chen (Multim. Tools Appl., 2024)