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INTERNATIONAL JOURNAL OF PARALLEL EMERGENT AND DISTRIBUTED SYSTEMS 2020年第6期35卷 668-681页

作者： Akl, Selim G. Queens Univ Sch Comp Kingston ON K7L 3N6 Canada

An algorithm is described for encrypting a graph to be transmitted securely from a sender to a receiver. In communications terminology, "the graph is the message": its vertices, its edges, and its edge weights are the information to be concealed. The encryption algorithm is based on an unconventional mapping, conjectured to be a trapdoor one-way function, designed for graphs. This function requires the sender and the receiver to use a secret one-time encryption/decryption key. It is claimed that a malicious eavesdropper with no knowledge of the key will be faced with a computational task requiring exponential time in the size of the input graph in order to extract the original plaintext from the ciphertext carried by the encrypted graph. A number of variants to the main algorithm are also proposed.

关键词： Cryptography cryptanalysis cryptology encryption decryption secret key one-way function trapdoor one-way function graph multigraph plaintext ciphertext one-time key encryption algorithm encryption scheme public-key cryptosystem malleability confusion diffusion graph database homomorphic encryption social networks unconventional cryptographic function quantum cryptography protocol molecular encoding

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A visual DNA compilation of Rossler system and its application in color image encryption

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CHAOS SOLITONS & FRACTALS 2023年第1期174卷

作者： Zou, Chengye Wang, Lin Yanshan Univ Coll Informat Sci & Engn Qinhuangdao 066004 Peoples R China Dalian Univ Technol Fac Elect Informat & Elect Engn Dalian 116024 Peoples R China Informedia Elect Co Ltd Dalian Peoples R China

This paper proposes the use of visual DNA compilation for the Ro & BULL;ssler chaotic system in the context of semi synthetic biology, which has promising prospects for the development of next-generation computers. The proposed method utilizes DNA toehold mediated strand displacement circuit and fluorescent labeling to construct a DNA circuit as a pseudo-random number generator with high information entropy. To overcome the degeneration of the key space due to the finite precision of concentration detection, the key space is expanded based on the keys of dk. Additionally, concentrations of DNA strand detected in valid time are transformed into diverse multiple blocks to construct chaotic sequences. Experimental results demonstrate that the proposed encryption approach is highly secure and has a strong ability to resist common attacks. Specifically, the proposed image encryption algorithm provides positive security and is resistant to diverse attacks, thus ensuring the information security of the plaintext image.

关键词： Semi-synthetic biology DNA toehold mediated strand displacement reaction encryption algorithm

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Securecipher: An instantaneous synchronization stream encryption system for insider threat data leakage protection

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EXPERT SYSTEMS WITH APPLICATIONS 2024年 254卷

作者： Montano, Isabel Herrera Diaz, Juan Ramos Aranda, Jose Javier Garcia Molina-Cardin, Sergio Lopez, Juan Jose Guerrero Diez, Isabel de la Torre Univ Valladolid Dept Signal Theory & Commun & Telemat Engn Paseo Belen 15 Valladolid 47011 Spain Nokia Dept Innovat Maria Tubau St 9 Madrid 28050 Spain

The paper addresses the persistent challenge of insider threat in cybersecurity. Despite advancements in detection and prevention technologies and approaches, the complexity of digital environments and the ingenuity of insiders remain a problem. We propose an encryption algorithm called Securecipher, specifically designed to protect file systems from insider threats. The requirements that an algorithm must meet in this context are outlined, along with a method for its development. A context-based key generation mechanism is introduced, eliminating the need for key storage. A file marking mechanism is proposed that enables protection of the encryption algorithm against specific insider threat attacks. The proposed encryption algorithm meets the requirements posed by insider threats and has successfully passed 87 % of the NIST tests, equivalent to 13 out of 15 tests passed. Compared to conventional algorithms, the proposed encryption algorithm is more efficient in the context of insider threats, allowing access to distant locations instantaneously. In the specific case of the comparison with the RC4 algorithm, it showed a 0.25 s higher speed when accessing the last position of a 128-bytes file. Furthermore, a significant increase in the vocabulary of the encrypted text with Securecipher compared to the original text is observed, approximately 42 times more.

关键词： encryption algorithm Decryption algorithm Secure file system Insider threat Information security

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Face Image encryption Using Fuzzy K2DPCA and Chaotic MapReduce

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TEHNICKI VJESNIK-TECHNICAL GAZETTE 2024年第4期31卷 1143-1153页

作者： Luo, Yunxiao Li, Ju Chongqing Open Univ Chongqing 401520 Peoples R China Chongqing Technol & Business Inst Chongqing 401520 Peoples R China

As technology continues to advance, safeguarding personal privacy and information security has become increasingly critical. Facial image encryption algorithms involve encrypting and decrypting facial images to prevent unauthorized access and malicious use. Fuzzy computation is a practical solution for many decision problems in facial recognition encryption algorithms. To this end, this study proposes the use of fuzzy two-dimensional kernel principal component analysis for facial recognition and chaotic MapReduce for facial image encryption. The study introduces fuzzy membership functions to handle uncertainty in two-dimensional kernel principal component analysis. Experimental results indicated that the accuracy of the fusion fuzzy calculation and two-dimensional kernel principal component analysis method exceeded 75%, which was 13-37% higher than the comparison method. Furthermore, the proposed method combining chaotic systems and MapReduce has a uniform histogram distribution and runs 50% faster than the comparison method. Consequently, it is evident that the method proposed by the research institute is both feasible and efficient for safe facial image analysis.

关键词： encryption algorithm facial image recognition fuzzy computing two-dimensional kernel principal component analysis

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Research on Medical Data Storage and Sharing Model Based on Blockchain 7

Research on Medical Data Storage and Sharing Model Based on ...

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IEEE/ACM 7th Symposium on Edge Computing (SEC)

作者： Zhao, Jian Qiang, Wenqian Zhao, Zisong An, Tianbo Kuang, Zhejun Xu, Dawei Shi, Lijuan Changchun Univ Coll Network Secur Changchun Peoples R China Changchun Univ Coll Comp Sci & Technol Changchun Peoples R China Changchun Univ Coll Elect Informat Engn Changchun Peoples R China

ISBN: (纸本)9781665486118

With the process of medical informatization, medical diagnosis results are recorded and shared in the form of electronic data in the computer. However, the security of medical data storage can not be effectively protected and the unsafe sharing of medical data among different institutions is still a hidden danger that can not be underestimated. To solve the above problems, a secure storage and sharing model of private data based on blockchain technology and homomorphic encryption is constructed. Based on the idea of blockchain decentralization, the model maintains a reliable medical alliance chain system to ensure the safe transmission of data between different institutions;A privacy data encryption and computing protocol based on homomorphic encryption is constructed to ensure the safe transmission of medical data;Using its complete anonymity to ensure the Blockchain of medical data and patient identity privacy;A strict transaction control management mechanism of medical data based on Intelligent contract automatic execution of preset instructions is *** security verification, compared with the traditional medical big data storage and sharing mode, the model has better security and sharing.

关键词： Blockchain encryption algorithm Medical data Secure message processing systems Storage models Shared-resource systems

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A new n-dimensional conservative chaos based on Generalized Hamiltonian System and its' applications in image encryption

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CHAOS SOLITONS & FRACTALS 2022年第0期154卷 111693-111693页

作者： Liu, Xilin Tong, Xiaojun Wang, Zhu Zhang, Miao Harbin Inst Technol Sch Comp Sci & Technol Weihai 264209 Peoples R China Harbin Inst Technol Sch Informat Sci & Engn Weihai 264209 Peoples R China

In view of the problem that dissipative chaos has attractors and is easy to be attacked by reconstruction, which leads to the security defects of encryption algorithm based on dissipative chaos, we design a new general form of n-dimensional conservative chaos according to the generalized Hamiltonian system. Taking four-dimensional (4D) as an example, numerical verification and performance analysis show that the conservative chaos has excellent chaotic characteristics such as wide ergodicity, no attractors, no chaotic degradation, and it can resist reconstruction and other attacks. Based on this 4D conservative chaos, we propose a new image encryption algorithm, which includes the plaintext related dynamic scrambling method and the dynamic diffusion mechanism of quadrilateral rule (MQR). Moreover, the initial values of the system are controlled by the external key stream and the internal key stream, so that the generation of ciphertext information are closely related with that of plaintext information, part of the ciphertext information, pseudo-random sequence and the key stream, which can increase the ability of the algorithm to resist plaintext and other attacks. Experimental simulation and performance analysis show that the encryption algorithm has better security and real time communication. (C) 2021 Elsevier Ltd. All rights reserved.

关键词： Dissipative chaos encryption algorithm Conservative chaos Generalized Hamiltonian system Dynamic scrambling Diffusion mechanism of quadrilateral rule

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Overview of Image encryption Technology based on Chaos and Neural Network

International Core Journal of Engineering

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International Core Journal of Engineering 2021年第10期7卷 196-201页

作者： Mindan Zhang Ye Tao Wenyu Zhang

Artificial neural network is a very important operation model in the field of artificial intelligence. Ann deals with complex problems by simulating the structure and logic of human brain. Chaotic system is a dynamic system of deterministic, disordered and nonlinear motion. Whether random factors are added or not, it can show a random phenomenon, that is, it shows internal randomness, the motion trajectory is not periodic or divergent, and it depends on the initial value, and the sensitivity is also stronger. This paper introduces the types of ciphers in cryptography, encryption algorithms in cryptography and the characteristics of chaos, and introduces in detail the feedforward neural network, feedback neural network and self-organizing neural network in neural network, as well as the current encryption algorithms based on chaos and neural network.

关键词： Chaos Image encryption encryption algorithm Neural Network

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Cryptanalysis and Improvement in a Plaintext-Related Image encryption Scheme Based on Hyper Chaos

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IEEE ACCESS 2019年 7卷 126450-126463页

作者： Liu, Lidong Zhang, Zhaolun Chen, Ruijie Changan Univ Sch Informat Engn Xian 710064 Shaanxi Peoples R China Xidian Univ Sch Commun Engn Xian 710071 Shaanxi Peoples R China

Recently, a plaintext-related image encryption scheme based on a hyper-chaotic system has been proposed by Li et al. In their encryption scheme, the permutation process is related to the sum of plaintext pixel values, and the diffusion process is related to the values of nine special positions in the permuted image. This can resist the existing chosen plaintext attack due to the ever-changing permutation matrix and diffusion matrix when the plaintext is changed. Here, we show that Li's encryption scheme contains two vulnerabilities. First, the gray values of the nine specific pixels do not change during diffusion. Second, the permutation process is reversible. Therefore, the diffusion process can be attacked and the permuted image can be obtained by constructing a special image, where the nine special position values in the special image's permuted image are the same as those in the cipher image. Then, if the obtained permuted image is chosen as plaintext, we can get its permuted image by attacking the diffusion process. Since the permutation process is reversible, the permuted image is the original plaintext image. In addition, some improvements for Li's encryption scheme are provided to enhance the security.

关键词： Chaos encryption algorithm chaotic cryptography cryptanalysis

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KEY HANDLING WITH CONTROL VECTORS (REPRINTED FROM JOURNAL OF CRYPTOLOGY, VOL 3, NO 2, 1990)

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IBM SYSTEMS JOURNAL 1991年第2期30卷 151-174页

作者： MATYAS, SM IBM CORP KINGSTON DEV LABCRYPTOG CTR COMPETENCEKINGSTONNY 12401

A method is presented for controlling cryptographic key usage based on control vectors. Each cryptographic key has an associated control vector that defines the permitted uses of the key within the cryptographic system. At key generation, the control vector is cryptographically coupled to the key via a special encryption process. Each encrypted key and control vector is stored and distributed within the cryptographic system as a single token. Decryption of a key requires respecification of the control vector. As part of the decryption process, the cryptographic hardware also verifies that the requested use of the key is authorized by the control vector. This paper focuses mainly on the use of control vectors in cryptosystems based on the Data encryption algorithm.

关键词： .Token decryption processof Common Cryptographic control vectors key usage cryptographic system key generation key and control encryption algorithm cryptographic hardware key-management key-encrypting

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Secure fuzzy recognition and its general problems

Secure fuzzy recognition and its general problems

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3rd International Symposium on Safety Science and Technology (2002 ISSST)

作者： Li, Y Shi, KQ Hu, HQ Shandong Univ Sch Math & Syst Sci Jinan 250100 Peoples R China

ISBN: (纸本)703010787X

The paper is a term of research in which fuzzy recognition theory, information encryption theory and encryption technique are mutually engrafted. encryption of fuzzy recognition and its general concept are introduced in the paper. It gives the mathematic structure of encryption of fuzzy recognition. The encryption algorithm of fuzzy recognition and its application are presented in the article.

关键词： fuzzy recognition recognition model encryption of recognition encryption algorithm application

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