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2007 7th International Conference on ASIC Electronic Version(ASICON 2007)

作者： Wanzhong Sun,Hongpeng Guo,Huilei He,Zibin Dai Institute of Electronic Technology,Information Engineering University,Zhengzhou 450004,China

Coupled with the increasing demand for strong secure data transmission in communications,SHA-2 hash family is becoming the newest powerful hash function *** this paper,a reconfigurable architecture is *** architecture supports a multi-mode operation in the sense that it performs all the three hash functions algorithms(256,384 and 512) of the SHA-2 ***,the performance of proposed implementation in the term of throughput and resources is higher than other hardware implementations,due to using critical data path optimization and the method of reducing word *** this work can substitute efficiently the existing MD5 and SHA-1 hash function implementations in every security scheme,also offers a higher security level strength.

关键词： SHA Design and Optimized Implementation of the SHA-2 hash algorithms

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hash-based FDI attack-resilient distributed self-triggered secondary frequency control for islanded microgrids

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Global Energy Interconnection 2025年第1期8卷 1-12页

作者： Xing Huang Yulin Chen Donglian Qi Yunfeng Yan Shaohua Yang Ying Weng Xianbo Wang College of Electrical Engineering Zhejiang UniversityHangzhou 310027PR China Hainan Institute of Zhejiang University Sanya 572000PR China State Key Laboratory of Internet of Things for Smart City University of Macao999078Macao Special Administrative Region of China

Given the rapid development of advanced information systems,microgrids(MGs)suffer from more potential attacks that affect their operational *** distributed secondary control with a small,fixed sampling time period inevitably causes the wasteful use of communication *** paper proposes a self-triggered secondary control scheme under perturbations from false data injection(FDI)*** designed a linear clock for each DG to trigger its controller at aperiodic and intermittent ***-sequently,a hash-based defense mechanism(HDM)is designed for detecting and eliminating malicious data infiltrated in the *** the aid of HDM,a self-triggered control scheme achieves the secondary control objectives even in the presence of FDI *** theoretical analyses and simulation results indicate that the introduced secondary control scheme significantly reduces communication costs and enhances the resilience of MGs under FDI attacks.

关键词： Microgrids Distributed secondary control Self-triggered control hash algorithms False data injection attack

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Optimal design of multiple hash tables for concurrency control

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IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING 1997年第3期9卷 384-390页

作者： Chen, MS Yu, PS IBM CORP THOMAS J WATSON RES CTRYORKTOWN HTSNY 10598

In this paper, we propose the approach of using multiple hash tables for lock requests with different data access patterns to minimize the number of false contentions in a data sharing environment. We first derive some theoretical results on using multiple hash tables. Then, in light of these derivations, a two-step procedure to design multiple hash tables is developed. In the first step, data items are partitioned into a given number of groups. Each group of data items is associated with the use of a hash table in such a way that lock requests to data items in the same group will be hashed into the same hash table. In the second step, given an aggregate hash table size, the hash table size for each individual data group is optimally determined so as to minimize the number of false contentions. Some design examples and remarks on the proposed method are given. It is observed from real database systems that different data sets usually have their distinct data access patterns, thus resulting in an environment where this approach can offer significant performance improvement.

关键词： concurrency control hash algorithms lock contentions multiple hash tables

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hashchip: A shared-resource multi-hash function processor architecture on FPGA

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INTEGRATION-THE VLSI JOURNAL 2007年第1期40卷 11-19页

作者： Ganesh, T. S. Frederick, M. T. Sudarshan, T. S. B. Somani, A. K. Iowa State Univ Dependable Comp & Networking Lab Ames IA 50011 USA Birla Inst Technol & Sci Pilani 333031 Rajasthan India

The ubiquitous presence of mobile devices and the demand for better performance and efficiency have motivated research into embedded implementations of cryptography algorithms. In this paper, we propose and explore multiple architectural options for the ***. The hashChip is a hardware architecture aimed at providing a unified solution to the task of message hashing with integrated message padding by aggressive exploitation of similarities in the structure of three commercially popular hash algorithms, namely, MD5, SHA1 and RIPEMD160. A generic approach to prototype digital systems on the Xilinx Virtex 2P embedded FPGA platform is presented and utilized for evaluating the hashChip architectures. The performance of the architectures is studied and evaluated for different design metrics. Throughputs in the range of 200-330 Mbps are obtained on the Xilinx Virtex2P FPGA depending on the input message size and algorithm choice. (C) 2006 Elsevier B.V. All rights reserved.

关键词： hash algorithms hardware architecture FPGAs prototyping

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Concerns about hash cracking - Aftereffect on authentication procedures in applications of cyberspace

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IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE 2007年第1期22卷 3-7页

作者： Wang, Shiuh-Jeng Ke, Hung-Jui Huang, Jia-Hung Chan, Chien-Lung Cent Police Univ Dept Informat Management Tao Yuan 333 Taiwan Changhua Cty Police Bur Informat Management Off Changhua 500 Taiwan Yuan Ze Univ Dept Informat Management Taoyuan 333 Taiwan

In the Crypto 2004 conference [6], one of the big news was that a fundamental technique in Cryptography - one of the hash algorithms, Message Digest 5 (MD5) had been cracked. Soon after this event, it was announced that the Secure hash Algorithm (SHA-1) had been cracked as well. This series of information shocked the researches in the field of cryptography, and raised the attention of every related organization of security application mechanisms. Most agencies are still looking into the impact this may have, and are considering their future responses and solutions in the wake of these developments in the hash structure of cryptanalysis. Based on this information, this paper will discuss in detail the broken MD5 and SHA-1, which both are reported to have been cracked, and will investigate any impact, and propose recommendations for the applications in cyber-space, such as password authentication and forensic software, when using a hash algorithm.

关键词： cryptography message authentication Message Digest 5 cryptanalysis cyberspace forensic software hash algorithms password authentication secure hash algorithm security application mechanisms Secure hashing Algorithm message authentication Online resources cryptography hashing CRYPTANALYSIS MD5

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Significantly improved performances of the cryptographically generated addresses thanks to ECC and GPGPU

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COMPUTERS & SECURITY 2010年第4期29卷 419-431页

作者： Cheneau, Tony Boudguiga, Aymen Laurent, Maryline TELECOM SudParis Inst TELECOM CNRS Samovar UMR 5157 F-91011 Evry France

Cryptographically Generated Addresses (CGA) are today mainly used with the Secure Neighbor Discovery Protocol (SEND). Despite CGA generalization, current standards only show how to construct CGA with the RSA algorithm and SHA-1 hash function. This limitation may prevent new usages of CGA and SEND in mobile environments where nodes are energy and storage limited. In this paper, we present the results of a performance and security study of the CGA and SEND. To significantly improve the performances of the CGA, we investigate first replacing RSA with ECC (Elliptic Curve Cryptography) and ECDSA (Elliptic Curve DSA), and second using the General-Purpose computing on Graphical Processing Units (GPGPU). Finally, a performance comparison between different hash algorithms (SHA-256, WHIRLPOOL,...) allows to prepare a better transition for the CGA when SHA-1 will be deprecated. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： CGA ECC ECDSA RSA Performances hash algorithms GPGPU

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Error-free transmission in a W-band satellite channel

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SPACE COMMUNICATIONS 2003年第2期19卷 91-100页

作者： Pratesi, M Ruggieri, M De Luise, A Univ Roma Tor Vergata Dept Elect Engn I-00133 Rome Italy

The Data Collection Experiment (DCE) of the scientific mission DAVID (Data and Video Interactive Distribution) of the Italian Space Agency will pioneer the use of the W-band for telecommunications experiments. In particular, a quasi error-free collection of high volumes of data will be achieved through the exploitation of a W-band link between remote or virtually remote sites and the DAVID satellite. To complete the end-to-end transfer, data will be transparently forwarded through Ka-band links provided by the ARTEMIS satellite to ARTEMIS earth stations and then to the Internet. This paper proposes a coding scheme to achieve a quasi error-free end-to-end data transfer and a method to check the presence/absence of errors on all the involved links.

关键词： DAVID W-band error-free data transfer hash algorithms Reed-Solomon coding

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A modified secure hash design to circumvent collision and length extension attacks

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JOURNAL OF INFORMATION SECURITY AND APPLICATIONS 2022年 71卷

作者： Al-Odat, Zeyad A. Khan, Samee U. Al-Qtiemat, Eman Tafila Tech Univ Tafila Jordan Mississippi State Univ Mississippi State MS USA

This paper introduces an improved version of the secure hash algorithms, SHA-1, and SHA-2. The proposed work produces a strengthened secure hash design using the fusion between the SHA-1 and SHA-2 hash standards. This design helps to protect the SHA-1 and SHA-2 against collision and length extension attacks. The proposed design is incorporated in the round steps of the hash functions using the function manipulators of the SHA-1 and SHA-2. Moreover, the proposed design employs a padding method that is different from the one used in the SHA-1 and SHA-2 construction. The proposed design is verified by the official test vectors that were confirmed by the National Institute of Standard and Technology. Moreover, the avalanche effect, hamming distance, and bit-hit properties were studied using different test cases. The proposed design gives over 52 percent of the avalanche effect and over 84 hamming distance. The proposed design was tested against collision attack and produced unique hash values for real collided examples and shows resistance against length extension attack.

关键词： Cryptography hash algorithms Collision attack Length extension attack

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Implementation and comparison of the functions of building blocks in SHA-2 family used in secured cloud applications

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JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY 2019年第2期22卷 323-335页

作者： Leekha, Alka Shaikh, Alam Visvesvaraya Technol Univ Belgaum 590018 Karnataka India Bharati Vidyapeeth Coll Engn New Delhi 110063 India Padmabhushan Vasantdada Patil Pratishthans Coll E Mumbai 400022 Maharashtra India

A Secure hash algorithm is grounded on the principles of message digest algorithms that are used in the design of the algorithms like MD4 and MD5. The main application of this algorithm is that it can be used in security applications for authentication and data validation like message authentication, digital signature and fingerprinting. It can also be used in detecting duplicate data and uniquely identifying files. In this paper we analyzed the role of some of the building blocks of SHA-2 family. We have demonstrated that the disturbance-correction strategy is applicable to the SHA-512 architecture and proved that functions Sigma,partial derivative are vital for the security of SHA-512, without them it is possible to find collisions with complexity 264 hash operations. We also demonstrated the functioning of 256-bit which was previously designed for 32 bit architecture but in this paper it is implemented using 64-bit architecture.

关键词： hash algorithms SHA-2 SHA-256 SHA-512 SHA-384 SHA-224 SHA-512/256 SHA-512/224

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PHISHPIN: AN INTEGRATED, IDENTITY-BASED ANTI-PHISHING APPROACH

PHISHPIN: AN INTEGRATED, IDENTITY-BASED ANTI-PHISHING APPROA...

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International Conference on Security and Cryptography

作者： Tout, Hicham Nova SE Univ Sch Comp & Informat Sci Ft Lauderdale FL 33314 USA

ISBN: (纸本)9789896740054

Phishing is a social engineering technique used to fraudulently acquire sensitive information from users by masquerading as a legitimate entity. One of the primary goals of phishing is to illegally carry fraudulent financial transactions on behalf of users. The two primary vulnerabilities exploited by phishers are: Inability of non-technical/unsophisticated users to always identify spoofed emails or Web sites;and the relative ease with which phishers masquerade as legitimate Web sites. This paper presents Phishpin, an approach that leverages the concepts of mutual authentication to require online entities to prove their identities. To this end, Phishpin builds on One-Time-Password, DNS, partial credentials sharing, & client filtering to prevent phishers from masquerading as legitimate online entities.

关键词： Phishing Spam Information security Identity theft Social engineering Encryption hash algorithms One time password Digital certificates Online scams Web Pharming

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