Omar A. Dawood, Abdul Monem S. Rahma, Abdul Mohsen J. Abdul Hossen · International Journal of Computer Network and Information Security · 2015
In the present paper we have proposed a new variant of AES cipher with high level of security and an elegant construction called TIGRIS cipher. The TIGRIS name has been derived from one of the two famous rivers in Iraq. The proposed TIGRIS cipher is a revision for the proposed Euphrates cipher which has already been published. It has been designed with a good coherent structure that is based on solid algebraic and well mathematical opinions. The proposed cipher uses the SPN structure and what is known by the Galois Field GF (2 8 ). It is an iterated cipher that has a conservative design which is easily implemented on both hardware and software. It operates with block size of 128-bits and with three variable key lengths of 128-bits, 192-bits and 256bits in addition to sixteen rounds or multiples of four rounds. The proposed cipher works with good invertible operations' stages and a compact duplicated ciphering key. The Tigris cipher construction strategy includes the adoption of construction a new S-box with high nonlinearity that uses the same routines of the AES-S-box stage but with different modular arithmetic of irreducible polynomial and different affine matrix in addition to the distinct constant vector. The second and the third layers of the proposed model are based on the shifting concept for the confusion and diffusion process with reversible operations. The last layer of the proposed model is the key addition layer that is responsible for the expanding and generating the ciphering key by two directions those of row and column expansion, which are associated with two constant vectors of golden ratio and base nature algorithm as a fixed word to eliminate any weak or semiweak ciphering key.
Cited by 16Open access
2008
The MAG paper [1] never went deeper into the cipher design issues and this notes may make some design choices clearer. Second reason for these notes is to show how the MAG algorithm may be used as a fast stream cipher. The implementation example will use “masking with key stream ” variant mentioned in [1] (see figure
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Bayer, Tomáš · Brno University of Technology Digital Library (Brno University of Technology) · 2009
Tato diplomová práce pojednává o problematice kryptografických systémů a šifrovacích algoritmů, u nichž je rozebráno, jak fungují, kde se využívají a jak se implementují v praxi. V první kapitole jsou uvedeny základní kryptografické pojmy, rozdělení algoritmů na symetrické a asymetrické a zhodnocení jejich použití a spolehlivostí. Následující kapitoly popisují substituční a transpoziční šifry, blokové a proudové šifry, z nichž je většina šifrovacích algoritmů odvozena. V neposlední řadě jsou jmenovány a popsány režimy, v nichž šifry pracují. Ve čtvrté kapitole jsou popsány principy některých konkrétních šifrovacích algoritmů. Cílem je přiblížit podstatu fungování jednotlivých algoritmů. U těch složitějších algoritmů jako DES a GOST jsou pro lepší představu přiložena bloková schémata popisující průběh a pořadí prováděných operací. V závěru každého algoritmu je uveden příklad jeho použití v praxi. Následující pátá kapitola pojednává o tématu hardwarové implementace šifer. V této kapitole je porovnána hardwarová implementace se softwarovou a to hlavně z praktického úhlu pohledu. Jsou popsány různé prostředky návrhu implementace a různé programovací jazyky pro návrh hardwarové implementace algoritmů. U programovacích jazyků jsou uvedeny jejich vývoj, výhody a nevýhody. Kapitola šestá pojednává o samotném návrhu vybraných šifrovacích algoritmů. Konkrétně se jedná o návrh hardwarové implementace proudové šifry s generátorem pseudonáhodné posloupnosti založeným na LFSR navrhnuté v jazyku VHDL a také v programu Matlab. Jako druhý návrh hardwarové implementace byla zvolena bloková šifra GOST. Tato byla navržena v jazyce VHDL. Funkce obou návrhů implementací šifrovacích algoritmů byly otestovány a výsledky zhodnoceny.
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Zuheir H. Ali, Ali Shakir Mahmood, Salim Ali Abbas Al Ageelee · 2012
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Sufyan Al-Janabi · i-manager’s Journal on Software Engineering · 2007
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Christophe De Cannière, Bart Preneel · 2005
Abstract. In this paper, we propose a new stream cipher construction based on block cipher design principles. The main idea is to replace the building blocks used in block ciphers by equivalent stream cipher components. In order to illustrate this approach, we construct a very simple synchronous stream cipher which provides a lot of flexibility for hardware implementations, and seems to have a number of desirable cryptographic properties. 1
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Christophe De Cannière · Lirias (KU Leuven) · 2006
Cited by 198
Ruby B. Lee, Zhenwu Shi, Yiqun Lisa Yin · 2004
New and emerging applications can change the mix of operations commonly used within computer architectures. It is sometimes surprising when instruction-set architecture (ISA) innovations intended for one purpose are used for other (initially unintended) purposes. This paper considers recent proposals for the processor support of families of bit-level permutations. From a processor architecture point of view, the ability to support very fast bit-level permutations may be viewed as a further validation of the basic word-orientation of processors, and their ability to support next-generation secure multimedia processing. However, bitwise permutations are also fundamental operations in many cryptographic primitives and we discuss the suitability of these new operations for cryptographic purposes. 1.
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Ali H. Kashmar, Eddie Shahril Ismail, Firdaus M. Hamzah et al. · International Journal of Applied Physics and Mathematics · 2015
By employing the characteristics of the basic structure (keystream), Stream ciphers designers attempt to create algorithms that have advanced features from security and speed point of view.They take into consideration the state-of-the-art scientific and technical developments to design more advanced algorithm versions.This research proposes the design of a new efficient and secure stream cipher, named BloStream which proves to be more secure than conventional stream ciphers that commonly implement Exclusive-OR (XOR) for mixing.The proposed algorithm encompasses two major components.The first part involves the Pseudo Random Number Generator (PRNG), exhausting Rabbit algorithm.And the second part involves a nonlinear invertible round function (combiner), depending on Rijndael-like function algorithm, to perform the encryption/decryption processes.This new construction strengthens the weak XOR combiner.The proposed cipher is not only a random number generator but also a self-synchronizing stream cipher in such a way that the cipher text influences its internal functioning.The proposed algorithm utilizes 16-bytes secret key to encrypt the plaintext which is a multiple of 16-bytes up to 2 64 bytes length.The evaluation of BloStream performance, in terms of implementation aspects and security properties as well as the statistical test for keystream and comparison with similar systems revealed that, BloStream was more efficient, faster, and securer than the conventional stream ciphers.
Cited by 4Open access
Dhairya Savla, Prof. Ruchi Rautela · International Journal for Research in Applied Science and Engineering Technology · 2023
Abstract: Cyber security is the application of technologies, processes and controls to guard systems, networks, programs, devices and data from cyber-attacks. Cryptology is the study of securing Computer systems that allow only sender and receiver to read it.Cryptology comes from Greek word ‘Kryptos’ which means ‘hidden’ and ‘logos’ means ‘to study of’. Even though security is important, numerous applications have been created without considering fundamental points of data security that is confidentiality, authentication, and availability. As we depend more on the internet, security issues and problems will also increase. To prevent alteration or access of data by unauthorized persons, cryptography is required. A methodology is proposed to increase the efficiency of the Caesar cipher which is the simplest cipher. This research introduces a new hybrid secure Caesar cipher by combining the three most important Ciphers (Caesar Cipher, Vigenère Cipher, Polybius Cipher) and Diffie-Hellman technique This hybrid encryption cipher provides better security as compared to normal Caesar ciphers.
Cited by 0Open access
Ruby Lee Shi, Z. J. Shi, Y. L. Yin · 2004
New and emerging applications can change the mix of operations commonly used within computer architectures. It is sometimes surprising when instruction-set architecture (ISA) innovations intended for one purpose are used for other (initially unintended) purposes. This paper considers recent proposals for the processor support of families of bit-level permutations. From a processor architecture point of view, the ability to support very fast bit-level permutations may be viewed as a further validation of the basic word-orientation of processors, and their ability to support next-generation secure multimedia processing. However, bitwise permutations are also fundamental operations in many cryptographic primitives and we discuss the suitability of these new operations for cryptographic purposes. 1.
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Shivam Vatshayan, Raza Abbas Haidri, Jitendra Kumar Verma · 2020 International Conference on Computational Performance Evaluation (ComPE) · 2020
The Cryptography is gotten from a Greek word which implies the craft of ensuring data by changing it into a muddled organization and unreadable format. It is a mix of arithmetic and software engineering. The dynamite growth of the Internet has made an expanded familiarity with intrigue uncertainty issues. Even though security is the measure worries over the internet, numerous applications have been created and structured without considering fundamental destinations of data security that is confidentiality, authentication, and protection. As our day by day exercises become increasingly more dependent upon data networks, the significance of an understanding of such security issues and trouble will also increase. To forestall some undesirable clients or individuals to gain admittance to the data, cryptography is required. .This paper introduces a new hybrid security cipher by combining the two most important Ciphers such as Polybius Cipher and Vigenère Cipher. This hybrid encryption cipher provides greater security as compared to classic ciphers.
Cited by 14
S. Divya, B.Deepthi Reddy, Desaboina Sravanthi · 2016
In today's computer-centric world, the Internet and other forms of electronic communication become more prevalent, electronic security is becoming increasingly important. Cryptography is used to protect e-mail messages, credit card information, and corporate data. One of the most popular cryptography systems used on the Internet is Pretty Good Privacy because it's effective and free cryptography is most often associated with scrambling plaintext into cipher text. Individuals who practice this field are known as cryptographers. Cryptography is closely related to the disciplines of cryptology and cryptanalysis. Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit. The ability to securely store and transfer sensitive information has proved a critical factor in success in war and business. This paper is to provide digital signatures that can be repudiated and increase security.
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M. Arvandi, S. Wu, Alireza Sadeghian et al. · The 2006 IEEE International Joint Conference on Neural Network Proceedings · 2006
In this paper, a neural network-based symmetric cipher design methodology is proposed to provide high performance data encryption. The proposed approach is a novel attempt to apply the parallel processing capability of neural networks for cryptography purposes. By incorporating neural networks approach, the proposed cipher releases the constraint on the length of the secret key. The proposed cipher is robust in resisting different cryptanalysis attacks and provides efficient data integrity and authentication services. The design of the symmetric cipher is presented and its security is analyzed. Simulation results are presented to validate the effectiveness of the proposed cipher design.
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Burcu Yancatarol Yagiz · Proceedings of DRS · 2010
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Korkonda Srivaishnavi, G. Sowmya, P Laxmikanth et al. · 2024
This paper introduces a novel block cipher architecture incorporating S-box and P-box structures. The cipher is implemented using the Verilog hardware description language and synthesized on the Xilinx Vivado FPGA platform. S-box and P-box components are crucial for ensuring robust encryption and are meticulously designed to enhance security and efficiency. The design methodology, implementation specifics, and performance metrics of the proposed block cipher are detailed. Experimental results on the Xilinx Vivado platform showcase the cipher's efficacy in terms of security and resource utilization, underscoring its potential for secure data encryption across diverse applications.
Cited by 1
P. Saravanan, J. Jenitha, S. R. Aasish et al. · 2021
Quantum computers will have a significant impact on the security aspects of many conventional cryptographic algorithms as the quantum circuit implementation of the cryptographic algorithms can be attacked with the help of Grover’s key search algorithm. This work proposes quantum circuit design of RECTANGLE lightweight cipher for 80-bit and 128-bit key variants. All the individual modules of the cipher are designed with minimal quantum resources and finally they are integrated together to build the complete quantum circuit. The quantum circuit synthesis is performed with Toffoli family of quantum gates. The proposed design outperforms the existing design by achieving low-latency. The quantum resources are also estimated to mount the quantum attack by using Grover’s key search algorithm.
Cited by 3
Medhini Urs, S Santhameena · 2024
Securing the data which is being transmitted between the devices is vitally important. With the improvements in technology security of the data is also becoming more essential each day. The devices with constrained environments are known as LRD’s (Low Resource Devices). The ciphers that are used to provide security for these devices where the available resources are limited by balancing the security with available resources are known as lightweight ciphers. In this paper, we have proposed a round function and pipelined architectures of one round and multiple rounds per stage using the proposed round function for Simon32/64. The ASIC implementation of the proposed architectures has been simulated and synthesized using the Cadence Genus Synthesis tool. The pipelined architectures of one and multiple rounds per stage using the existing round function and the proposed round function has been implemented and compared the results which shows that the pipelined architectures using the proposed round functions outperform the existing one by providing better results in terms of power reduction by 15%, throughput increment by 13% and area reduction by 13%.
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Smile Markovski, Aleksandra Mileva, Vesna Dimitrova · Goce Delchev University Repository (Goce Delčev University of Štip) · 2010
The quasigroup string transformations have been used for defining several crypto primitives. Based on them, many successful cryptosystems of different kinds were published recently. Here we investigate possibilities of designing block ciphers based on quasigroup transformations. We show thefresistance of these designs to multiset attacks. Starting ideas of possible constructions by using quasigroups of small orders and of huge orders are discussed too.
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Johan Wallén · 2000
In this paper, we discuss some of theory of provable security against differential and linear cryptanalysis. We also review the design principles of the block cipher KASUMI—especially its resistance against the basic forms of linear and differential cryptanalysis. Key words. KASUMI, differential cryptanalysis, linear cryptanalysis, provable security, correlation. 1
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