G. N. Krishnamurthy, V. Ramaswamy
this paper demonstrates analysis of well known block cipher CAST-128 and its modified version using avalanche criterion and other tests namely encryption quality, correlation coefficient, histogram analysis and key sensitivity tests.
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Cloud Security Assurance: Strategies for Encryption in Digital Forensic Readiness
本文研究云安全提升策略，分析加密技术、密钥管理及数字取证就绪的作用与挑战，提出整合二者的统一安全策略，以增强组织威胁抵御能力、保障云业务信任。
Owing to a number of reasons, the deployment of encryption solutions are beginning to be ubiquitous at both organizational and individual levels. The most emphasized reason is the necessity to ensure confidentiality of privileged information. Unfortunately, it is also popular as cyber-criminals' escape route from the grasp of digital forensic investigations. The direct encryption of data or indirect encryption of storage devices, more often than not, prevents access to such information contained therein. This consequently leaves the forensics investigation team, and subsequently the prosecutio…
Enhanced cast-128 with adaptive s-box optimization via neural networks for image protection
本文提出一种基于混沌LSM生成动态S盒的增强CAST-128算法，以提升图像加密的随机性和抗攻击能力，显著优于原始CAST-128。
A new digital image encryption method based on fast compressed sensing approach using structurally random matrices and Arnold transform is proposed. Considering the natural images to be compressed in any domain, the fast compressed sensing based approach saves computational time, increases the quality of the image and reduces the dimension of the digital image by choosing even 25 % of the measurements. First, dimension reduction is utilized to compress the digital image with scrambling effect. Second, Arnold transformation is used to give the reduced digital image into more complex form. Then,…
A discrete-time discrete-value pseudo-chaotic encoder/decoder system is presented. The pseudo-chaotic module is a 3D discrete version of the well-known Lorenz dynamical system. Scaling and biasing transformations as well as natural number arithmetics are employed in order to simplify realizations on a small size Field Programmable Gate Array (FPGA. The encryption ability is improved by using only the least significant byte of one of the pseudo chaotic state variables as the key to encrypt the plain text. The key is periodically perturbed by another chaotic state variable. The statistical prope…
Proxy Re-encryption based Fair Trade Protocol for Digital Goods Transactions via Smart Contracts
针对数字商品交易中的公平性与安全问题，提出基于被动代理重加密和区块链智能合约的公平交易协议，由仲裁协议保障公平，并通过实验验证其可行性与有效性。
In this paper, a new image encryption scheme using a secret key of 144-bits is proposed. In the substitution process of the scheme, image is divided into blocks and subsequently into color components. Each color component is modified by performing bitwise operation which depends on secret key as well as a few most significant bits of its previous and next color component. Three rounds are taken to complete substitution process. To make cipher more robust, a feedback mechanism is also applied by modifying used secret key after encrypting each block. Further, resultant image is partitioned into …
Innovating Augmented Reality Security: Recent E2E Encryption Approaches
本文探讨了端到端加密（E2EE）在保护隐私与阻碍执法之间的双重角色，分析了其对现代数字通信隐私的关键重要性及所带来的挑战。
In this paper, algorithms for multivariate public key cryptography and digital signature are described. Plain messages and encrypted messages are arrays, consisting of elements from a fixed finite ring or field. The encryption and decryption algorithms are based on multivariate mappings. The security of the private key depends on the difficulty of solving a system of parametric simultaneous multivariate equations involving polynomial or exponential mappings. The method is a general purpose utility for most data encryption, digital certificate or digital signature applications. For security pro…
Multimedia data security is becoming important with the continuous increase of digital communications on internet. The encryption algorithms developed to secure text data are not suitable for multimedia application because of the large data size and real time constraint. In this paper, classification and description of various video encryption algorithms are presented. Analysis and Comparison of these algorithms with respect to various parameters like visual degradation, encryption ratio, speed, compression friendliness, format compliance and cryptographic security is presented.
In this paper, algorithms for multivariate public key cryptography and digital signature are described. Plain messages and encrypted messages are arrays, consisting of elements from a fixed finite ring or field. The encryption and decryption algorithms are based on multivariate mappings. The security of the private key depends on the difficulty of solving a system of parametric simultaneous multivariate equations involving polynomial or exponential mappings. The method is a general purpose utility for most data encryption, digital certificate or digital signature applications.
Chaotic behavior arises from very simple non-linear dynamical equation of logistic map which makes it was used often in designing chaotic image encryption schemes. However, some properties of chaotic maps can also facilitate cryptanalysis especially when they are implemented in digital domain. Utilizing stable distribution of the chaotic states generated by iterating the logistic map, this paper presents a typical example to show insecurity of an image encryption scheme using chaotic logistic map. This work will push encryption and chaos be combined in a more effective way.
A Chaotic Image Encryption Scheme Using Novel Geometric Block Permutation and Dynamic Substitution
本文提出一种基于混淆-扩散架构的混沌图像加密方案，通过几何分块置换、二维Henon映射位异或和动态替换实现高安全性，熵值达7.9974、相关系数仅0.0014。
With the enormous usage of digital media in almost every sphere from education to entertainment, the security of sensitive information has been a concern. As images are the most frequently used means to convey information, therefore the issue related to the privacy preservation needs to be addressed in each of the application domains. There are various security methods proposed by researchers from time to time. This paper presents a review of various image encryption schemes based on fractional integral transform. As the fractional integral transforms have evolved through their applications fr…
The hurried development of multimedia and internet allows for wide distribution of digital media data. It becomes much easier to edit, modify and duplicate digital information. In additional, digital document is also easy to copy and distribute, therefore it may face many threats. It became necessary to find an appropriate protection due to the significance, accuracy and sensitivity of the information. Furthermore, there is no formal method to be followed to discover a hidden data. In this paper, a new information hiding framework is presented.The proposed framework aim is implementation of fr…
With the advancement in technology, digital images can easily be transmitted and stored over the Internet. Encryption is used to avoid illegal interception of digital images. Encrypting large-sized colour images in their original dimension generally results in low encryption/decryption speed along with exerting a burden on the limited bandwidth of the transmission channel. To address the aforementioned issues, a new encryption scheme for colour images employing convolutional autoencoder, DNA and chaos is presented in this paper. The proposed scheme has two main modules, the dimensionality conv…
X-Cross: Image Encryption Featuring Novel Dual-Layer Block Permutation and Dynamic Substitution Techniques
本文提出X-CROSS图像加密算法，通过双层块置换（含比特间转移和X-cross像素置换）与动态替换技术，结合二维混沌映射，有效消除图像固有模式并提升抗攻击能力。
A High-Performance Fractal Encryption Framework and Modern Innovations for Secure Image Transmission
本文提出基于傅里叶变换的分形加密方法，以提高图像加密的安全性和效率，并优化加密解密时间与图像保真度。
Encryption techniques demonstrate a great deal of security when implemented in an optical system (such as holography) due to the inherent physical properties of light and the precision it demands. However, such systems have shown to be vulnerable during digital implementations under various crypt-analysis attacks. One of the primary reasons for this is the predictable nature of the security keys (i.e., simulated random keys) used in the encryption process. To alleviate, in this work, we are presenting a Physically Unclonable Functions (PUFs) for producing a robust security key for digital encr…
The increased growth in the use of transmission of multimedia medical contents over unsecured and open networks provides insecurity for confidential patient information over these networks. Digital encryption of medical images before transmission and storage is proposed as a way to effectively provide protection of patient information. Encryption before watermarking of these images is necessary in order to ensure inaccessibility of information to unauthorized personnel with patient. This paper presented a visual cryptographic technique for encrypting of medical images before transmission or st…
A robust image encryption scheme based on new 4-D hyperchaotic system and elliptic curve
针对图像加密需求，提出含两个非线性项的简洁4维超混沌系统，将其与椭圆曲线密码学（ECC）映射方案结合，经混淆扩散两阶段加密，仿真验证其安全性能，可应用于多领域实现鲁棒图像加密。
In this paper, we propose an image encryption algorithm based on the chaos, substitution boxes, nonlinear transformation in Galois field and Latin square. Initially, the dynamic S boxes are generated using Fisher Yates shuffle method and piece wise linear chaotic map. The algorithm utilizes advantages of keyed Latin square and transformation to substitute highly correlated digital images and yield encrypted image with valued performance. The chaotic behavior is achieved using Logistic map which is used to select one of thousand S boxes and also decides the row and column of selected S box. The…
Recently, a chaotic image encryption algorithm based on information entropy (IEAIE) was proposed. This paper scrutinizes the security properties of the algorithm and evaluates the validity of the used quantifiable security metrics. When the round number is only one, the equivalent secret key of every basic operation of IEAIE can be recovered with a differential attack separately. Some common insecurity problems in the field of chaotic image encryption are found in IEAIE, e.g. the short orbits of the digital chaotic system and the invalid sensitivity mechanism built on information entropy of th…
EncryIP: A Practical Encryption-Based Framework for Model Intellectual Property Protection
针对机器学习模型的知识产权保护需求，提出集成公钥加密的EncryIP框架，生成混淆标签仅授权用户可解密，无需重复训练且保精度，优于现有水印、触发器、护照类方法。
In recent years, several encryption algorithms have been proposed to protect digital images from cryptographic attacks. These encryption algorithms typically use a relatively small key space and therefore, provide safe, especially if they are of a dimension. In this paper proposes an encryption algorithm for a new image protection scheme based on the rotation of the faces of a Magic Cube. The original image is divided into six sub-images and these sub-images are divided amongst a number of blocks and attached to the faces of a Magic Cube. The faces are then scrambled using rotation of the Magi…
This article will describe an optical encryption technical of images which it is proposed in an analogical and digital way. The development of the technical to a digital level, it is made to implementing algorithms (routines) in MATLAB. We will propose a functional diagram to the described analogical development from which designated the optical systems associated with each functional block. Level of security that the jigsaw algorithms provide applied on an image, which has been decomposed into its bit-planes, is significantly better if they are applied on an image that has not been previously…
The vast parallelism, exceptional energy efficiency and extraordinary information inherent in DNA molecules are being explored for computing, data storage and cryptography. DNA cryptography is a emerging field of cryptography. In this paper a novel encryption algorithm is devised based on number conversion, DNA digital coding, PCR amplification, which can effectively prevent attack. Data treatment is used to transform the plain text into cipher text which provides excellent security
Medical images are commonly stored in digital media and transmitted via Internet for certain uses. If a medical information image alters, this can lead to a wrong diagnosis which may create a serious health problem. Moreover, medical images in digital form can easily be modified by wiping off or adding small pieces of information intentionally for certain illegal purposes. Hence, the reliability of medical images is an important criterion in a hospital information system. In this paper, Fresnelet transform is employed along with appropriate handling of the Arnold transform and the discrete cos…
W3ID: A Quantum Computing-Secure Digital Identity System Redefining Standards for Web3 and Digital Twins
针对量子计算对现有加密的威胁及Web3的安全需求，提出W3ID通用数字身份模型，通过生成适配Web3的DOI、双密钥认证及四重SHA-256验证机制，大幅提升抗量子攻击能力，为Web3和数字孪生生态树立身份安全新基准。
A Hybrid Image Encryption Scheme based on Chaos and a DPA-Resistant Sbox
针对现有图像加密方案的弱点，提出一种基于混沌和抗DPA S盒的混合加密方案，提高安全性和效率，并在常见攻击下表现更优。
Ciphertext Policy Attribute Based Encryption with Intel SGX
本研究针对CP-ABE运算的安全增强需求，提出结合Intel SGX的方案，在SGX飞地内按策略安全加解密，实验验证其在仅增加极小执行时间的前提下兼具性能与可扩展性。
Image Encryption Scheme Based on Hyper-Chaotic Map and Self-Adaptive Diffusion
本文提出一种结合新型2D-RA超混沌映射与自适应扩散方法的图像加密方案，实验验证其混沌性能与加密效果均显著优于现有先进技术。
It is known that chaotic systems have widely been used in cryptography. Generally, floating point simulations are used to generate pseudo-random sequence of numbers. Although, it is possible to find some works on the degradation of chaotic systems due to finite precision of digital computers, little attention has been paid to exploit this limitation to formulate efficient process for image encode. This article proposes a novel image encryption method using natural interval extensions. The sequence of arithmetic operations is different in each natural interval extension. This is what we need to…
Non-malleability is an important security property for public-key encryption (PKE). Its significance is due to the fundamental unachievability of integrity and authenticity guarantees in this setting, rendering it the strongest integrity-like property achievable using only PKE, without digital signatures. In this work, we generalize this notion to the setting of quantum public-key encryption. Overcoming the notorious "recording barrier" known from generalizing other integrity-like security notions to quantum encryption, we generalize one of the equivalent classical definitions, comparison-base…
Adaptive Fuzzy Logic-Based Steganographic Encryption Framework: A Comprehensive Experimental Evaluation
本文提出结合模糊推理系统与现代认证加密的自适应隐写框架，通过局部熵、边缘幅度和负载压力动态调整嵌入深度，提升隐蔽容量与视觉质量，同时采用Argon2id和AES-256-GCM保障信息安全。
Recently, a new domino signal encryption algorithm (DSEA) was proposed for digital signal transmission, especially for digital images and videos. This paper analyzes the security of DSEA, and points out the following weaknesses: 1) its security against the brute-force attack was overestimated; 2) it is not sufficiently secure against ciphertext-only attacks, and only one ciphertext is enough to get some information about the plaintext and to break the value of a sub-key; 3) it is insecure against known/chosen-plaintext attacks, in the sense that the secret key can be recovered from a number of…
This paper proposes to study the impact of image selective encryption on both forensics and privacy preserving mechanisms. The proposed selective encryption scheme works independently on each bitplane by encrypting the s most significant bits of each pixel. We show that this mechanism can be used to increase privacy by mitigating image recognition tasks. In order to guarantee a trade-off between forensics analysis and privacy, the signal of interest used for forensics purposes is extracted from the 8--s least significant bits of the protected image. We show on the CASIA2 database that good tam…
Visually Image Encryption and Compression Using a CNN-Based Auto Encoder
本文提出基于CNN自编码器的对称视觉图像加密与压缩方法，通过结合随机掩码生成加密数据集并在降维潜在空间中学习特征重建图像，有效保护数据机密性并降低维度。
Advancing Biomedical Signal Security: Real-Time ECG Monitoring with Chaotic Encryption
本研究开发了集成混沌加密的实时心电图监测系统，通过逻辑斯蒂映射动态加密信号，在保障安全性的同时实现基于深度学习的实时疾病检测，适用于远程医疗。研究证实混沌加密能有效提升数据安全性，为生物医学信号安全传输提供了可行方案。
LenslessMic: Audio Encryption and Authentication via Lensless Computational Imaging
本文提出LenslessMic，利用无透镜计算成像作为物理层安全手段，实现音频鲁棒认证和接近256位数字标准的加密强度，并通过低成本Raspberry Pi原型验证。
Since the first appearance in Fridrich's design, the usage of permutation-diffusion structure for designing digital image cryptosystem has been receiving increasing research attention in the field of chaos-based cryptography. Recently, a novel chaotic Image Cipher using one round Modified Permutation-Diffusion pattern (ICMPD) was proposed. Unlike traditional permutation-diffusion structure, the permutation is operated on bit level instead of pixel level and the diffusion is operated on masked pixels, which are obtained by carrying out the classical affine cipher, instead of plain pixels in ICM…
The growing potential of modern communications needs the use of secure means to protect information from unauthorized access and use during transmission. In general, encryption a message using cryptography techniques and then hidden a message with a steganography methods provides an additional layer of protection. Furthermore, using these combination reduces the chance of finding the hidden message. This paper proposed a system which combines schemes of cryptography with steganography for hiding secret messages and to add more complexity for steganography. The proposed system secret message en…
Digital Privacy in IoT: Exploring Challenges, Approaches and Open Issues
本文探讨物联网中数字隐私的风险与挑战，提出IEEE隐私模型分类框架，分析加密、区块链等隐私增强技术，并介绍AURA-IoT框架以应对AI驱动的隐私风险。
The need for fast and strong image cryptosystems motivates researchers to develop new techniques to apply traditional cryptographic primitives in order to exploit the intrinsic features of digital images. One of the most popular and mature technique is the use of complex ynamic phenomena, including chaotic orbits and quantum walks, to generate the required key stream. In this paper, under the assumption of plaintext attacks we investigate the security of a classic diffusion mechanism (and of its variants) used as the core cryptographic rimitive in some image cryptosystems based on the aforemen…
Harnessing Lightweight Ciphers for PDF Encryption
本文首次将 NIST 轻量级密码竞赛获胜者 ASCON 与入围者 XOODYAK 的 Java 实现同 PDF 现行加密标准 AES 进行基准比较，结果显示 ASCON 在 YourKit 和 JMH 测试中吞吐量更优。
Encryption of Audio Signals Using the Elzaki Transformation and the Lorenz Chaotic System Lorenz Chaotic System
本研究提出一种结合 Lorenz 混沌理论与 Elzaki 变换的音频信号加密新方法，通过双曲函数 Maclaurin 级数展开和模运算生成密钥，实验证明该方法有效且具备实际应用的安全性。
Noise-Crypt: Image Encryption with Non-linear Noise, Hybrid Chaotic Maps, and Hashing
本文提出图像加密算法 Noise-Crypt，融合非线性随机噪声、logistic-tent 与 logistic-sine-cosine 混合混沌映射及 SHA-256，通过增强伪随机序列与替换盒选择并引入噪声非线性，实现熵约 7.99、相关性约 -0.0040 的鲁棒加密。
One of the most important consideration techniques when one want to solve the protecting of digital signal is the golden matrix. The golden matrices can be used for creation of a new kind of cryptography called the golden cryptography. Many research papers have proved that the method is very fast and simple for technical realization and can be used for cryptographic protection of digital signals. In this paper, we introduce a technique of encryption based on combination of haar wavelet and golden matrix. These combinations carry out after compression data by adaptive Huffman code to reduce dat…
Registered Attribute-Based Encryption with Publicly Verifiable Certified Deletion, Everlasting Security, and More
本文提出首个支持认证删除和永恒安全的RABE方案，结合量子安全技术实现信息不可逆删除与隐私保护。
Steganography is the art of hiding the fact that communication is taking place, by hiding information in other information. Different types of carrier file formats can be used, but digital images are the most popular ones because of their frequency on the internet. For hiding secret information in images, there exists a large variety of steganography techniques. Some are more complex than others and all of them have respective strong and weak points. Many applications may require absolute invisibility of the secret information. This paper intends to give an overview of image steganography, it'…
Digital Watermarking is used for copyright protection and authentication. In the proposed system, a Dual Watermarking Scheme based on DWT SVD with chaos encryption algorithm, will be developed to improve the robustness and protection along with security. DWT and SVD have been used as a mathematical tool to embed watermark in the image. Two watermarks are embedded in the host image. The secondary is embedded into primary watermark and the resultant watermarked image is encrypted using chaos based logistic map. This provides an efficient and secure way for image encryption and transmission. The …
In recent years, characterized by the innovation of technology and the digital revolution, the field of media has become important. The transfer and exchange of multimedia data and duplication have become major concerns of researchers. Consequently, protecting copyrights and ensuring service safety is needed. Cryptography has a specific role, is to protect secret files against unauthorized access. In this paper, a hierarchical cryptosystem algorithm based on Logistic Map chaotic systems is proposed. The results show that the proposed method improves the security of the image. Experimental resu…
A Dual-Layer Image Encryption Framework Using Chaotic AES with Dynamic S-Boxes and Steganographic QR Codes
本研究提出融合混沌增强AES-128与隐写QR码的双层图像加密框架，通过动态混沌操作提升加密性能，借助QR码隐写实现双密钥安全分发，实验验证其在熵值、抗差分攻击等方面表现优异，可用于多领域敏感图像传输。
With the fast evolution of digital data exchange and increased usage of multi media images, it is essential to protect the confidential image data from unauthorized access. In natural images the values and position of the neighbouring pixels are strongly correlated. The method proposed in this paper, breaks this correlation increasing entropy of the position and entropy of pixel values using block shuffling and encryption by chaotic sequence respectively. The plain-image is initially row wise shuffled and first level of encryption is performed using addition modulo operation. The image is divi…
Privacy is one of the key issues addressed by information Security. Through cryptographic encryption methods, one can prevent a third party from understanding transmitted raw data over unsecured channel during signal transmission. The cryptographic methods for enhancing the security of digital contents have gained high significance in the current era. Breach of security and misuse of confidential information that has been intercepted by unauthorized parties are key problems that information security tries to solve. This paper sets out to contribute to the general body of knowledge in the area …
Still and multi-media images are subject to transformations for compression, steganographic embedding and digital watermarking. In a major program of activities we are engaged in the modeling, design and analysis of digital content. Statistical and pattern classification techniques should be combined with understanding of run length, transform coding techniques, and also encryption techniques.
QMedShield: A Novel Quantum Chaos-based Image Encryption Scheme for Secure Medical Image Storage in the Cloud
针对云存储医疗图像的隐私安全问题，提出基于量子混沌的QMedShield加密方案，通过位平面置乱、量子操作、DNA编码等步骤实现加密，经多指标评估和攻击验证，其抗攻击性和鲁棒性优于现有方案，保障云环境中医疗图像安全存储。
Lightweight Public Key Encryption in Post-Quantum Computing Era
针对量子计算对RSA和DH等公钥加密的威胁，提出基于椭圆曲线的Cramer-Shoup轻量级加密方案，可抵御自适应选择密文攻击，适用于物联网，为后量子时代安全加密奠定基础。
Leveraging Blockchain and Proxy Re-Encryption to secure Medical IoT Records
针对医疗物联网数据安全共享问题，提出结合私有区块链与代理重加密的架构，实现防篡改记录与细粒度访问控制，保障数据隐私与信任。
Post-Quantum Cryptography: Securing Digital Communication in the Quantum Era
本文分析了量子计算对RSA等传统密码系统的威胁，介绍了后量子密码学（PQC）的原理及格基等多种抗量子算法，强调了其在量子时代保障数字通信数据安全的关键作用。
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