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An efficient poly-quantum integrity key generation based multi-user access control encryption and decryption framework for homogeneous and heterogeneous cloud EHR databases

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INFORMATION SECURITY JOURNAL 2025年

作者： Garigipati, Nagababu Srithar, S. Krishna Reddy, V Koneru Lakshmaiah Educ Fdn Dept Comp Sci & Engn Vaddeswaram Andhra Prades India

Cloud data security is a critical concern in the healthcare industry, particularly when it comes to protecting electronic health records (EHRs). To ensure that only authorized parties have access to sensitive patient information, it is necessary to employ secure key distribution, quantum key generation, and multi-user data encryption and decryption techniques. These techniques effectively prevent unauthorized access and insider attacks, thereby safeguarding EHRs stored in the cloud. The application of advanced cryptographic methods, such as AES and QKD, further enhances EHR security by providing protection against brute force attacks and other security threats. Prioritizing cloud data security is essential for maintaining patient privacy and confidentiality, which requires a combination of advanced encryption methods and robust key management practices. Quantum key distribution (QKD) enables secure sharing of secret keys between two parties over an insecure communication channel, ensuring that only authorized entities can access sensitive patient information. In this work, a novel Poly-Quantum key generation method is implemented to enhance the integrity of the secret key generation process. Chaotic Poly-Quantum keys are used to generate integrity values of variable sizes for multi-user encryption and decryption operations. Consequently, an advanced multi-user quantum integrity-based multi-access control encryption and decryption approach is developed for homogeneous and heterogeneous electronic health records, aiming to enhance cloud data security. Scalability Evaluation: To assess performance in large-scale healthcare environments, comprehensive scalability testing should be conducted. This will validate the framework's efficiency and reliability under extensive workloads. The proposed Poly-Quantum-based security model marks a significant advancement in cloud-based healthcare data protection, laying a foundation for future quantum-enhanced cryptographic solutions.

关键词： Cloud computing electronic health record encryption and decryption integrity computation quantum key distribution

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Chaotic encryption and decryption of JPEG image

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OPTIK 2014年第2期125卷 717-720页

作者： Zhang, Dinghui Zhang, Fengdeng Univ Shanghai Sci & Technol Sch Opt Informat & Comp Engn Shanghai Key Lab Modern Opt Syst Shanghai 200093 Peoples R China

According to encrypting principles of digital images, integrating the characteristic of JPEG image, and using discrete chaotic sequence, this paper has studied encryption and decryption of JPEG image, and has compared and analyzed the corresponding relations between the encryption and decryption effects and their security of two different encrypting schemes of the JPEG image chaotic encryption studied by this paper. In a basic unit of an 8 x 8 data block, image encryption and decryption not only are fast, but also match with JPEG format. The JPEG image encryption can meet the security requirement of the storage and transmission of JPEG images in some common application occasions, and provides an effective and feasible way of encrypting JPEG images. (C) 2013 Elsevier GmbH. All rights reserved.

关键词： JPEG image encryption and decryption Chaotic sequence Scramble

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Digital Image encryption and decryption Algorithm Based on Wavelet Transform and Chaos System

Digital Image Encryption and Decryption Algorithm Based on W...

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2016 IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference(IMCEC 2016)

作者： Xiaofeng Li Yinhui Zhang Department of Information Engineering Renai College of Tianjin University Department of SEL Samsung Mobile R&D Center China-Tianjin

ISBN: (纸本)9781509001668

During the transmission of digital image,in view of the security problem,use 2-D discrete wavelet transform and chaos system to realize the image encryption and *** the target image is encrypted,firstly,the ‘bior3.7' wavelet is used for wavelet decomposition;and it can get the low and high frequency wavelet coefficients;then,the 1-D Logistic chaos sequence is used to reorder the low frequency wavelet coefficient matrix,the encrypted image can be obtained with inverse wavelet *** process of decryption is opposite with encryption,after decrypting the chaos sequence,the decrypted image can be obtained with wavelet *** experiment results show that the encrypted image has high security,the decrypted image has small distortion and strong ability to resist noise attack;and the algorithm has good effectiveness and robustness.

关键词： encryption and decryption wavelet decomposition chaos sequence wavelet reconstruction

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Analytical Study of Hybrid Techniques for Image encryption and decryption

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SENSORS 2020年第18期20卷 5162.-5162.页

作者： Chowdhary, Chiranji Lal Patel, Pushpam Virenbhai Kathrotia, Krupal Jaysukhbhai Attique, Muhammad Perumal, Kumaresan Ijaz, Muhammad Fazal Vellore Inst Technol Sch Informat Technol & Engn Vellore 632014 Tamil Nadu India Vellore Inst Technol Sch Comp Sci & Engn Vellore 632014 Tamil Nadu India Sejong Univ Dept Software Seoul 05006 South Korea Sejong Univ Dept Intelligent Mech Engn Seoul 05006 South Korea

The majority of imaging techniques use symmetric and asymmetric cryptography algorithms to encrypt digital media. Most of the research works contributed in the literature focus primarily on the Advanced encryption Standard (AES) algorithm for encryption and decryption. This paper propose an analysis for performing image encryption and decryption by hybridization of Elliptic Curve Cryptography (ECC) with Hill Cipher (HC), ECC with Advanced encryption Standard (AES) and ElGamal with Double Playfair Cipher (DPC). This analysis is based on the following parameters: (i) encryption and decryption time, (ii) entropy of encrypted image, (iii) loss in intensity of the decrypted image, (iv) Peak Signal to Noise Ratio (PSNR), (v) Number of Pixels Change Rate (NPCR), and (vi) Unified Average Changing Intensity (UACI). The hybrid process involves the speed and ease of implementation from symmetric algorithms, as well as improved security from asymmetric algorithms. ECC and ElGamal cryptosystems provide asymmetric key cryptography, while HC, AES, and DPC are symmetric key algorithms. ECC with AES are perfect for remote or private communications with smaller image sizes based on the amount of time needed for encryption and decryption. The metric measurement with test cases finds that ECC and HC have a good overall solution for image encryption.

关键词： cryptography algorithm elliptic curve cryptography hill cipher advanced encryption standard double playfair cipher encryption and decryption peak signal to noise ratio Number of Pixels Change Rate (NPCR) Unified Average Changing Intensity (UACI) lossy compression

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Plant-Inspired Multifunctional Fluorescent Hydrogel: A Highly Stretchable and Recoverable Self-Healing Platform with Water-Controlled Adhesiveness for Highly Effective Antibacterial Application and Data encryption-decryption

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ACS APPLIED MATERIALS & INTERFACES 2020年第52期12卷 57686-57694页

作者： Wang, Nan Yu, Kang-Kang Li, Kun Li, Meng-Jie Wei, Xi Yu, Xiao-Qi Sichuan Univ Coll Chem Key Lab Green Chem & Technol Minist Educ Chengdu 610064 Peoples R China Sun Yat Sen Univ Affiliated Stomatol Hosp Guanghua Sch Stomatol Guangdong Prov Key Lab StomatolOperat Dent & End Guangzhou 510055 Guangdong Peoples R China

In recent years, hydrogels as an attractive class of intelligent soft materials have been applied in various advanced fields, including electronic materials, wearable devices, and wound dressing materials. However, it still remains a critical challenge to integrate information encryption transmission capability, antibacterial activity, high mechanical performance, adhesiveness, and self-healable ability into one material and achieve the synergistic characteristics through a simple method. In our study, a facile strategy of a plant-inspired hydrogel was proposed, which provides a novel initiator-free photo-cross-linked hydrogel system by simply mixing the coumarin derivative Pho-CA and the monomer in water, and then obtaining the hydrogel Gel-C-Am under the irradiation of UV light without adding any other cross-linking agents and initiators, and this process is very similar to the growth process of plants in nature. This novel hydrogel presents desirable mechanical properties (including twist, stretchability, and recoverability), which exhibits elongation of approximately 1600%. More interestingly, Gel-C-Am hydrogel displays reversible adhesiveness to various substrates (such as glass, paper, leaves, and rubber), and its adhesion properties can be regulated by water: the viscosity disappears when its surface becomes wet, and the viscosity will recover after the water evaporates. In addition, the developed hydrogel has certain self-healable ability. Two pieces of the Gel-C-Am hydrogel can combine together and reshape into one piece in water, and the fused hydrogel has uniform and interconnected pores under SEM. Based on the characteristic of Pho-CA whose fluorescence get recovery after UV irradiation, the hydrogel can be used in the field of encryption and decryption. Also, the resulting Gel-C-Am hydrogel shows an effective antibacterial activity and can potentially be addressed as antibacterial coatings. Taken together, the formation of the novel fluorescent hydrogel

关键词： initiator-free stretchable and recoverable adhesiveness self-healing antibacterial ability encryption and decryption

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The process analysis of encryption and decryption based on process dependency graphs

The process analysis of encryption and decryption based on p...

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2013 International Conference on Sport Science and Computer Science (CCCS 2013)

作者： Rui Chang Liehui Jiang Hongqi He Yun Zeng State Key Laboratory of Mathematic Engineering and Advanced Computing

At present,the research on reverse analysis of encrypting and decrypting process pays more attention to cryptographic algorithms *** is no mature theory or tools for the entire process analysis of encryption and *** order to solve the problem efficiently,this paper discusses encryption and decryption process dependency graphs,summarizes the existing research results about the cryptographic algorithms recognition technology,and explores a way to research the process analysis of encryption and decryption based on process dependency ***,the result on an example reveals the entire process analysis of encryption and decryption.

关键词： encryption and decryption reverse analysis process dependency graphs

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FSPAlgorithm for encryption/decryption

FSPAlgorithm for Encryption/Decryption

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International Conference on Computing, Communications and Networking

作者： Kalaichelvi, V. Chandrasekaran, R. M. Sastra Univ SRC Kumbakonam India Anna Univ Trichy India

ISBN: (纸本)9781424435944

Cryptography is one of the most important areas in the computer industry. encryption allows an application to secure its data from being accessed by hackers. This paper developed and designed an algorithm for encryption and decryption. Cryptography provides many methods and techniques for secure communication. Currently there are many industry standard encryption/decryption algorithms including RSA, Rijndael, Blowfish and so forth. However, they are fairly complex and require that one spend a lot of time to comprehend and implement them. This paper introduces simple encryption / decryption algorithm that is fast and fairly secure. The algorithms manipulate a 128-bit input using flipping, Substitution, and Permutation to achieve its encryption/decryption.

关键词： Cryptography Hacker Security encryption and decryption

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High-speed encryption & decryption System Based on SM4 Algorithm

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INTERNATIONAL JOURNAL OF SECURITY AND ITS APPLICATIONS 2016年第9期10卷 1-8页

作者： Lv Qian Li Li Cao Yan-yan Binzhou Polytech Sch Elect Engn Binzhou Peoples R China Binzhou Polytech Binzhou Peoples R China Binzhou Polytech Dept Elect Engn Binzhou Peoples R China

Nowadays, the network transmission and video encryption areas have urgently needed high-speed encryption systems for SM4 algorithm. To speed up the SM4 system in small area, three aspects in existing system is analyzed and optimized. Firstly, aiming at the prior encryption must wait long until completing all 32 rounds key expansion, a method is proposed for outputting round key in each key expansion to accelerate encryption response. Secondly, considering most user passwords are unchanged, we adopt additional memory for comparing old and new keys, so that key expansion can be cancelled sometimes. Thirdly, the paper analyses the relationship between key expansion and encryption/decryption algorithm in SM4. Using module reused technology, the designed key expansion module can also encrypt and decrypt, and the designed another two modules can both encrypt and decrypt. Therefore, the system can achieve three tasks' synchronous encryption/decryption, which greatly improves the system's processing speed. This paper presents a hardware design scheme for the high-speed system. At last, the optimized design is realized in FPGA. The experimental results show that the design is feasible, and the SM4 encryption speed can increase fourfold.

关键词： SM4 High speed encryption and decryption

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Privacy-preserving ADP for secure tracking control of AVRs against unreliable communication

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FRONTIERS IN NEUROROBOTICS 2025年 19卷 1549414页

作者： Zhang, Kun Han, Kezhen Hu, Zhijian Tan, Guoqiang Beihang Univ Sch Astronaut Beijing Peoples R China Univ Jinan Sch Elect Engn Jinan Peoples R China Univ Toulouse LAAS CNRS Toulouse France Loughborough Univ Dept Aeronaut & Automot Engn Loughborough England

In this study, we developed an encrypted guaranteed-cost tracking control scheme for autonomous vehicles or robots (AVRs), by using the adaptive dynamic programming technique. To construct the tracking dynamics under unreliable communication, the AVR's motion is analyzed. To mitigate information leakage and unauthorized access in vehicular network systems, an encrypted guaranteed-cost policy iteration algorithm is developed, incorporating encryption and decryption schemes between the vehicle and the cloud based on the tracking dynamics. Building on a simplified single-network framework, the Hamilton-Jacobi-Bellman equation is approximately solved, avoiding the complexity of dual-network structures and reducing the computational costs. The input-constrained issue is successfully handled using a non-quadratic value function. Furthermore, the approximate optimal control is verified to stabilize the tracking system. A case study involving an AVR system validates the effectiveness and practicality of the proposed algorithm.

关键词： adaptive dynamic programming encryption and decryption tracking control optimal control autonomous vehicle

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A Compact and Efficient Hardware Accelerator for RNS-CKKS En/Decoding and En/decryption

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 2025年第1期72卷 243-247页

作者： Wang, Jianfei Yang, Chen Hou, Jia Zhang, Fahong Meng, Yishuo Su, Yang Liu, Leibo Xi An Jiao Tong Univ Sch Microelect Xian 710049 Peoples R China Engn Univ Peoples Armed Police Sch Cryptog Engn Xian 710086 Peoples R China Tsinghua Univ Sch Integrated Circuits Beijing 100084 Peoples R China

To accelerate RNS-CKKS, little attention is paid to the acceleration of the operations on the edge-client. However, the devices used by the edge-client are often low-end and have limited resources and computing power, so the performance of RNS-CKKS encoding, decoding, encryption and decryption also needs to be improved. Consequently, we propose a compact and efficient hardware accelerator architecture named CAEA for these operations. In order to improve the compactness of CAEA, a reconfigurable butterfly unit is proposed, which considers both complex number arithmetic and integer modular arithmetic, so that FFT/IFFT and NTT/INTT can be executed on unified hardware processing elements without additional resource and waste. Moreover, in order to improve the computational efficiency, we also improved the dataflow of encoding, decoding, encryption, and decryption on CAEA to reduce the number of required operations and latency. CAEA is synthesized based on SMIC 40nm technology, and is also implemented on Xilinx Kintex-7 and Zynq UltraScale+ FPGA. Compared with the prior related works, in terms of performance, CAEA can achieve 2.01x speedup for encoding and decoding, 1.13x similar to 87.86x speedup for encryption, and 3.03x similar to 69.64x speedup for decryption. Compared with the state-of-the-art work, CAEA can achieve 1.06x similar to 4.96x improvement in terms of area efficiency.

关键词： Random access memory Encoding encryption Polynomials Decoding Cryptography Field programmable gate arrays CKKS FPGA accelerator encryption and decryption encoding and decoding

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