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3rd International Conference on Cryptography, Network Security and Communication Technology (CNSCT)

作者： Ji, Quan Wu, Zhongcheng Xie, Liyang Li, Yong Zhang, Jun Anhui Univ Inst Phys Sci & Informat Technol Hefei Anhui Peoples R China Chinese Acad Sci HFIPS High Field Magnet Lab Hefei 230031 Peoples R China High Magnet Field Lab Anhui Prov Hefei 230031 Peoples R China Univ Sci & Technol China Hefei 230031 Peoples R China

ISBN: (纸本)9798400716959

To prevent tampering with documents before they are deposited into the blockchain, a system called Sign Storage Evidence Chain (SSEChain) has been designed and implemented. SSEChain is a blockchain-based electronic document signing and depositing system. The RSA digital signature algorithm is used to protect document during the document reviewing and signing process. This prevents tampering of the signed document and ensures its authenticity from the time of application until it is uploaded to the chain. The RSA algorithm's encryption process can be optimized by using multiple prime numbers with N substitutions n, while the decryption process can be optimized using the Chinese remainder theorem. The combination of Fisco Bcos blockchain architecture and IPFS interstellar document system is used to achieve document deposit storage. This method guarantees the authenticity of the document from the moment of request until it is deposited on the blockchain. The experimental results demonstrate that the blockchain network can achieve a throughput of up to 680 transactions per second. The improved RSA algorithm can shorten the time between signature and verification.

关键词： RSA algorithm digital signature algorithm documents depositing document signing

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A Secured Storage and Communication System for Cloud Using ECC, Polynomial Congruence and DSA

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WIRELESS PERSONAL COMMUNICATIONS 2022年第2期126卷 949-974页

作者： Nithisha, J. Jayarin, P. Jesu Jeppiaar Engn Coll Dept Comp Sci & Engn Chennai Tamil Nadu India

Security is necessary for performing the effective data communications in internet and cloud environment. The data security in cloud is becoming very challenging task due to the presence of huge volume of cloud users. Even though, the various secured cloud data storage mechanisms are available and tried to fulfill the current requirement in terms of security level and efficiency. However, the available works are not obtained the enough security level and the efficiency while storing and sharing the data in cloud. For this purpose, this work proposes a new secured storage method for providing data security to store the data securely in cloud. The proposed system consists of three different algorithms for performing prime number generation, digital signature creation for generating keys, encryption, decryption and authorization. Here, a new technique to find a co-prime number which is used to generate keys in key generation process and also useful for performing encryption and decryption process. Moreover, a new key generation technique is also introduced for elliptic curve cryptography and digital signature algorithm using polynomial congruence for performing key generation process securely. In addition, a new elliptic curve and polynomial congruence based encryption/decryption algorithms for performing data encryption and decryption in the process of data storage and communication. Finally, the user authenticity is verified by the proposed digital signature algorithm in this work. The experiments have been conducted for evaluating the proposed secured storage and communication system and proved as better than others in terms of efficiency and security level.

关键词： Elliptic curves digital signature algorithm Encryption Decryption Key generation signature generation Signing and verification

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How (Not) to Build Threshold EdDSA 23

How (Not) to Build Threshold EdDSA

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26th International Symposium on Research in Attacks, Intrusions and Defenses (RAID)

作者： Wong, Harry W. H. Ma, Jack P. K. Yin, Hoover H. F. Chow, Sherman S. M. Chinese Univ Hong Kong Dept Informat Engn Shatin Hong Kong Peoples R China

ISBN: (纸本)9798400707650

Edwards-curve digital signature algorithm (EdDSA) is a highly efficient scheme with a short key size. It is derived from the threshold-friendly Schnorr signatures and is covered by the NIST standardization efforts of threshold cryptographic primitives. Nevertheless, extending its deterministic nonce generation to the threshold setting requires heavyweight cryptographic techniques, even when the hash function is replaced with one optimized for secure multiparty computation. Indeed, an efficient extension to the threshold setting is considered a major challenge by NIST and academia. In RAID 2022, a threshold EdDSA scheme is proposed with the nonce generation using only modular addition instead of a hash. This paper unveils the security flaw of this efficient design. We also propose a generic hybrid approach with a showcase of extending a state-of-the-art threshold Schnorr signature scheme. It enjoys a similar level of immunity to side-channel or fault injection attacks as the more heavyweight threshold extension of deterministic nonce generation, but is much more efficient due to its simplicity.

关键词： digital signature algorithm EdDSA Schnorr signatures Threshold EdDSA Threshold signatures

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Attacking (EC)DSA with partially known multiples of nonces

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INFORMATION AND COMPUTATION 2024年第PartB期301卷

作者： Adamoudis, Marios Draziotis, Konstantinos A. Poulakis, Dimitrios Aristotle Univ Thessaloniki Dept Math Thessaloniki 54124 Greece Aristotle Univ Thessaloniki Dept Informat GR-54124 Thessaloniki Greece

In this paper, we introduce a series of attacks on DSA schemes that, under certain assumptions, can expose the secret key when one or more signed messages are accessible. By utilizing these signed messages, we construct a system of linear congruences with at most one solution smaller than a specific bound, which can be efficiently determined using Babai's Nearest Plane algorithm. As a case study, we provide a successful attack on secp161k1, assuming that a particular multiple of an ephemeral key is 161 bits long. (c) 2024 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： digital signature algorithm Elliptic curve digital signature algorithm LLL algorithm Babai's nearest plane algorithm

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Efficient and Side-Channel Resistant Design of High-Security Ed448 on ARM Cortex-M4

Efficient and Side-Channel Resistant Design of High-Security...

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IEEE International Symposium on Hardware Oriented Security and Trust (HOST)

作者： Anastasova, Mila Bisheh-Niasar, Mojtaba Seo, Hwajeong Azarderakhsh, Reza Kermani, Mehran Mozaffari Florida Atlantic Univ Dept Comp & Elect Engn & Comp Sci Boca Raton FL 33431 USA Florida Atlantic Univ I SENSE Boca Raton FL 33431 USA Hansung Univ Div IT Convergence Engn Seoul 136792 South Korea Univ S Florida Dept Comp Engn & Sci Tampa FL 33620 USA

ISBN: (数字)9781665485326

ISBN: (纸本)9781665485326

The demand for classical cryptography schemes continues to increase due to the exhaustive studies on their security. Thus, constant improvement of liming, power consumption, and memory requirements are needed for the most widely used classical Elliptic Curve Cryptography (ECC) primitives, suiting high- as well as low-end devices. In this work, we present the first implementation of the Edwards Curve digital signature algorithm (EdDSA) based on the Ed448 targeting the ARM Cortex-M4-based STM32F407VG microcontroller, which forms a large part of the Internet of Things (IoT) world. We report timing and memory consumption results based on portable C and target-specific hand-crafted assembly code implementations of the low-level finite filed arithmetics. We optimize the high-level group operations by implementing the efficient scalar multiplication over the Ed448 isogenous map to reduce the computation complexity. Furthermore, we provide a side-channel analysis (SCA) and fault attack protected design by developing point randomization, scalar blinding techniques, and repeated signature, and evaluate the performance. Our optimized architecture performs a signature and verification in 39.88ms and 51.54ms, respectively, where SCA protection can he achieved at less than 6.4% cost of performance overhead.

关键词： ARM Cortex-M4 digital signature algorithm Ed448 elliptic curve cryptography side-channel

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Attacking (EC)DSA scheme with ephemeral keys sharing specific bits

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THEORETICAL COMPUTER SCIENCE 2024年 1001卷

作者： Adamoudis, M. Draziotis, K. A. Poulakis, D. Aristotle Univ Thessaloniki Dept Math Thessaloniki 54124 Greece Aristotle Univ Thessaloniki Dept Informat Thessaloniki 54124 Greece

In this paper, we present a deterministic attack on (EC)DSA signature scheme, providing that several signatures are known such that the corresponding ephemeral keys share a certain amount of bits without knowing their value. By eliminating the shared blocks of bits between the ephemeral keys, we get a lattice of dimension equal to the number of signatures having a vector containing the private key. We compute an upper bound for the distance of this vector from a target vector, and next, using Kannan's enumeration algorithm, we determine it and hence the secret key. The attack can be made highly efficient by appropriately selecting the number of shared bits and the number of signatures.

关键词： digital signature algorithm Elliptic curve digital signature algorithm Lattice LLL algorithm Kannan's enumeration algorithm

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The optimization of elliptic curve digital signature algorithm based on hyperchaotic

The optimization of elliptic curve digital signature algorit...

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2013 3rd International Conference on Advanced Materials and Information Technology Processing (AMITP 2013)

作者： Zuo-Peng Zhao Pei Li Guo-Juan Song Yuan-Yuan Zong Xue-Tao Zhang Qing-Hua Kang College of Computer Science and Technology China University of Mining and Technology College of Information and Electrical Engineering China University of Mining and Technology

ISBN: (纸本)9781845648534

This paper presents a digital signature algorithm(T-(HC&ECDSA)).With the purpose to improve performance and security,respectively,elliptic curve digital signature algorithm(ECDSA) is improved by introducing two-dimensional hyperchaotic encryption and transforming reversible complex operation of traditional algorithm into once-through multiplication *** security of the algorithm can be improved by using the features that two-dimensional hyperchaotic is suitable to encrypt for large-capacity information fast and *** addition,we analyze the signature algorithm from the sources of algorithm,and parameters in signature algorithm is equivalent to be replaced by using the panning property of vector,avoiding the inverse process and reducing the system configuration requirements,thereby improving the running speed of the *** the algorithm improve the running speed while guarantee the *** safety analysis and the conducted tests show that the improved algorithm has more advantages than other ECDSA,and it shows more advantages in safety and operating speed,which lays theoretical foundation for the transmission security of data.

关键词： digital signature algorithm elliptic curve two-dimensional hyperchaotic T-(HC&ECDSA)

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Cryptography Survey of DSS and DSA

Cryptography Survey of DSS and DSA

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International Conference on Advances in Materials and Manufacturing Engineering (ICAMME)

作者： Al-Absi, Mohammed Abdulhakim Abdullaev, Azamjon Al-Absi, Ahmed Abdulhakim Sain, Mangal Lee, Hoon Jae Dongseo Univ Div Informat & Commun Engn 47 Jurye Ro Busan 47011 South Korea Kyungdong Univ Dept Smart Comp 46 4-Gil Gosung 24764 Gangwon Do South Korea

ISBN: (纸本)9789811513077;9789811513060

digital signatures are the basis for identifying who sends file identities in modern society today. digital signatures are a way to provide integrity and reliability for digital data signatures. signatures use a set of principles and parameters that allow a computer to verify the identity and authentication of data. There are three algorithms for digital signature generation in the DSS. The first one is the RSA, the second is the ElGamal algorithm, and the third is the elliptic curve digital signature algorithm (ECDSA). This paper discusses the cryptography including different types of digital signatures based on the key type and some algorithms of digital signature, RSA, ElGamal, and ECDSA.

关键词： digital signature digital signature algorithm DSA ECDSA RSA DSS

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Enhancing an Attack to DSA Schemes 8th

Enhancing an Attack to DSA Schemes

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8th International Conference on Algebraic Informatics (CAI)

作者： Adamoudis, Marios Draziotis, Konstantinos A. Poulakis, Dimitrios Aristotle Univ Thessaloniki Dept Math Thessaloniki Greece Aristotle Univ Thessaloniki Dept Informat Thessaloniki Greece

In this paper, we improve the theoretical background of the attacks on the DSA schemes of a previous paper, and we present some new more practical attacks.

ISBN: (纸本)9783030213633;9783030213626

In this paper, we improve the theoretical background of the attacks on the DSA schemes of a previous paper, and we present some new more practical attacks.

关键词： Public key cryptography digital signature algorithm Elliptic Curve digital signature algorithm Closest Vector Problem LLL algorithm BKZ algorithm Babai's Nearest Plane algorithm

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DNACK: False Data Detection Based on Negative Acknowledgment and digital signature on Mobile Ad-hoc Network

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WIRELESS PERSONAL COMMUNICATIONS 2015年第1期83卷 1-15页

作者： Abarghouei, Babak Emami Farokhtala, Ali Alizadeh, Mojtaba Mem Univ Newfoundland St John NF Canada UTM Malaysian Japan Int Inst Technol Kuala Lumpur 54100 Malaysia

Mobile ad-hoc network is an interesting network, which is classified as an autonomous system. These types of networks are constructed based on low capacity wireless links, without having a centralized infrastructure system. Lack of central monitoring system makes it so vulnerable to an insider attack. These attacks consist of two main categories;false data and false route attack. An efficient intrusion detection system (IDS) should have a good understanding about the categories. It can be defined by comparison between (true positive network throughput/false throughput) and the packet delivery ratio. This paper, DNACK is proposed based on digital signature and standard method of Negative Acknowledgment, which is a new method of false data detection in case of en-route filtering IDS. DNACK members can detect both kinds of insider attacks, a false data (false data injected and false modified messages) and false route attacks (packet dropping and flooding attack), regards to DNACK characteristic. The false data will be detected based on source digital signature by upcoming member and the routing attacks, will be monitored by the last member. The network efficiency shall be guaranteed by using of DNACK because of the high percentage of Packet delivery and the minimum of false throughput.

关键词： Mobile ad-hoc network Intrusion detection system Hop-by-hop detection En-route filtering Routing attack Black-hole attack False data injection digital signature algorithm RSA NACK

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