New cryptanalysis of block ciphers with low algebraic degree. In this paper, we present a new thorough security analysis of the gmr2 cipher. And the algebraic method can also be used to determine the property of a balanced set after passed. Spyros stathopoulos, ali khiat, maria trapatseli, simone cortese, alexantrou serb, ilia valov, and themis prodromakis. Links among impossible differential, integral and zero. All content in this area was uploaded by ruilin li. Impossible differential cryptanalysis of spn ciphers. Institute of software, chinese academy of sciences, beijing, 100190, china. Communication complexity of conditional disclosure of.
Advances in cryptology eurocrypt 2016 35th annual international conference on the theory and applications of cryptographic techniques, vienna, austria, may 812, 2016, proceedings, part i. Multiround ciphers such as des are clearly very difficult to crack. Given sufficient pairs of plaintext and corresponding ciphertext, bits of information about the key can be obtained and increased amounts of data will usually give a higher probability of success. I want to customize my headings a little bit so it would have an icon before. We first study the inverse properties of the ciphers components to reveal. A 128bit data block was divided into eight 16bit blocks to reduce the hardware size. Ruilin li, hengli, chao li, andbing sun improving keyrecovery to 784 and 799 rounds oftrivium using optimized cubeattacks 502 pierrealain fouqueandthomas vannet near collision attack on the grain vl stream cipher 518 bin zhang, zhenqi li, dengguo feng, and dongdai lin automatedcryptanalysis exhaustingdemirciselcuk meetinthemiddle attacks. Chinese citizen sentenced to 12 years in prison for cyber. A realtime inversion attack on the gmr2 cipher used in the satellite.
This paper presented the smallest hardware architecture of the aria block cipher algorithm. New impossible differential cryptanalysis of aria cryptology. This attack is based on the 9round impossible differential 1 with additional two rounds at the beginning and two rounds at the end as shown in fig. In international workshop on fast software encryption, pages 181195. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. The main goal of this diploma work is the implementation of matsuis linear cryptanalysis of des and a statistical and theoretical analysis of its complexity and success probability. Articles covering either theoretical aspects or practical application are encouraged.
Department of mathematics and system science, science college, national university of defense technology, changsha, china. A realtime inversion attack on the gmr2 cipherused in. Notice that we move wk 1 and wk 3 and place them at the proper positions as shown in fig. Proceedings of international workshop on fast software encryption, singapore, 20. Linear cryptanalysis linear cryptanalysis is a powerful method of cryptanalysis introduced by matsui in 1993 11. These two needs gave rise to the art of coding the messages in such a way that only the intended people could have access to the information. Sign up cryptanalysis of an image scrambling encryption algorithm isea.
J chen, z dai, j duan, q hu, r li, h matzinger, i popescu, h zhai. Cryptanalysis of a generalized unbalanced feistel network. Currently, most methods for finding impossible differentials are based on the missinthe. Cme 211 earth 211 fall 2018 software development for scientists and engineers. It has been proven that such a cipher can be cracked using only one singleframe 15 bytes known keystream but with moderate executing time. The motivation in this paper is to fix this gap and establish links between impossible differential cryptanalysis and integral cryptanalysis. I am trying to design my own homepage and using this readonly template.
Program state sensitive parallel fuzzing for real world software. See the complete profile on linkedin and discover ruilin. For gfnlfsr containing n subblocks, we find an n2round integral distinguisher by algebraic methods and further use this integral to. Linear cryptanalysis was introduced by matsui at eurocrypt as a theoretical attack on the data encryption standard des and later successfully used in the practical cryptanalysis of des. See the complete profile on linkedin and discover ruilin s connections and jobs at similar companies. View ruilin lis profile on linkedin, the worlds largest professional community. Newest linearcryptanalysis questions cryptography stack. Impossible differential cryptanalysis of round clefia. The chinese journal of electronics publishes highquality research papers on advances in electronics interdisciplinary studies must emphasize the field of electronics. The algorithm uses a substitutionpermutation network structure based on aes. Cryptography or cryptology is the practice and study of techniques for secure communication in the presence of third parties called adversaries. Ruilin li senior associate general counsel university.
This paper reevaluates the security of gfnlfsr, a new kind of generalized unbalanced feistel network structure that was proposed at acisp 2009. Satellite phone, stream cipher, gmr2, cryptanalysis, inversion attack. Ruilin li, lei cheng, qingju wang, hoda alkhzaimi, and chao li. See the complete profile on linkedin and discover ruilin s. We show that gfnlfsr itself reveals a very slow diffusion rate, which could lead to several distinguishing attacks. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Any publication listed on this page has not been assigned to an actual author y. Use matlab and other numerical software appropriately, i. The gmr2 cipher is a type of stream cipher currently being used in some inmarsat satellite phones. Differential cryptanalysis 1 dc and linear cryptanalysis 2 lc are the two most. Although relations among other cryptanalytic approaches have been investigated, the link between these two methods has been missing. Differential and linear cryptanalysis radboud universiteit. The hardware based cryptography 84,27 has been in use for several decades, as. View the profiles of professionals named ruilin li on linkedin.
Students must pass the final exam to pass the course. Differential fault attack dfa is a powerful cryptanalytic technique to retrieve secret keys by exploiting the faulty ciphertexts generated during encryption procedure. Information security and privacy springer for research. Given an approximation with high probability and counting on the. I hope these programs will help people understand the beauty of machine learning theories and implementations. Impossible differential cryptanalysis of spn ciphers ruilin li1, bing sun1 and chao li1. Pdf a low data complexity attack on the gmr2 cipher used in. The number of rounds is 12, 14, or 16, depending on the key size. Currently, most methods for finding impossible differentials are based on the missinthemiddle technique and. We point out that a square distinguisher exists if and only if the degree of the polynomial function between nbit input which is active and nbit output which is balanced is. She received her advanced postgraduate diploma from the royal danish academy of music under the guidance of professor geir draugsvoll. View ruilin wangs profile on linkedin, the worlds largest professional community.
Bing sun, zhiqiang liu, vincent rijmen, ruilin li, lei cheng, qingju wang, hoda alkhzaimi, chao li. In cryptography, linear cryptanalysis is a general form of cryptanalysis based on finding affine approximations to the action of a cipher. Ruilin li at national university of defense technology ruilin li. Proceedings of the 7th international workshop on fast software encryption. Zhang and chao li emergence, impossible differential cryptanalysis has been applied to attack many. B sun, z liu, v rijmen, r li, l cheng, q wang, h alkhzaimi, c li. A realtime inversion attack on the gmr2 cipher used in the. Square attack on block ciphers with low algebraic degree.
Cryptanalysis of block ciphers with overdefined systems of. That cryptanalysis has a corresponding linear equation. As two important cryptanalytic methods, impossible differential cryptanalysis and integral cryptanalysis have attracted much attention in recent years. By bing sun, zhiqiang liu, vincent rijmen, ruilin li, lei cheng, qingju wang, hoda alkhzaimi and chao li. Sign up for your own profile on github, the best place to host code, manage projects, and build software alongside 40 million developers. It is a known plaintext attack in which the attacker studies the linear approximations of parity bits of the plaintext, ciphertext and the secret key. Bing sun, meicheng liu, jian guo, vincent rijmen, ruilin li.
Lets consider the linear cryptanalysis over the first 15 rounds of des des has 16 rounds. Combining some observations with new tricks, we can filter out the wrong keys more efficiently, and improve the impossible differential attack on 11round clefia192256, which also firstly works for clefia128. Probability distribution and bias of t1 t2 suppose z t 1 t2 is a pair of binary random variables, a a 1 a2 be a pair of bits and. A realtime inversion attack on the gmr2 cipherused in the. Implementations of machine learning algorithm by python 3. Differential fault attack on itubee block cipher acm.
Links among impossible differential, integral and zero correlation linear cryptanalysis. Pdf impossible differential cryptanalysis of spn ciphers. Ruilin li, hengli, chao li, andbing sun improving keyrecovery to 784 and 799 rounds oftrivium using optimized cubeattacks 502. Security evaluation of misty structure with spn round function. Impossible differential cryptanalysis is a very popular tool for analyzing the security of modern block ciphers and the core of such attack is based on the existence of impossible differentials. Journal of systems and software vol 84, issue 7, pages. Citeseerx document details isaac councill, lee giles, pradeep teregowda. This paper presents an improved impossible differential attack on the new block cipher clefia which is proposed by sony corporation at fse 2007. Partition calculus classification combinatorics cryptanalysis cryptography cryptosystems differential probability finite fields hash function insecure systems key encryption network security proxyreencryption. Citeseerx cryptanalysis of a generalized unbalanced. List of computer science publications by ruilin li. She took her master and bachelor degree at tianjin conservatory of music. Pdf improved impossible differential cryptanalysis of. Advances in cryptology eurocrypt 2016 springer for.
Impossible differential cryptanalysis of round clefia128. Linear and differential cryptanalysis saint francis university. Practical and provable security against differential and linear cryptanalysis for substitution. Cryptanalysis of the simon family of block ciphers. Ruilin li, bing sun, chao li, longjiang qu, cryptanalysis of a generalized unbalanced feistel network structure, proceedings of the 15th australasian conference on information security and privacy, july 0507, 2010, sydney, australia. Continuously developed for decades, sboxes are constantly evolving in terms of the design criteria for both security requirements and software hardware performances. Cryptanalysis of a generalized unbalanced feistel network structure. Using the previous 9round impossible differentials, the redundancy in the key schedule and the earlyabort technique, we present the first successful impossible differential cryptanalysis of round clefia128 in this paper. Cite this publication ruilin li at national university of defense technology ruilin li. The chinese journal of electronics publishes papers in the following areas. C impossible differential cryptanalysis of spn ciphers. Even so, little empirical research has been performed on the relationship between software architecture and software quality.
Ruilin li independently performing arts accordionist. Clefia is a 128bit block cipher proposed by sony corporation in fse 2007. V rijmen, r li, l cheng, q wang, h alkhzaimi, c li. Provable security evaluation of structures against impossible differential and zero correlation linear cryptanalysis. A low data complexity attack on the gmr2 cipher used in the satellite phones. Attacks have been developed for block ciphers and stream ciphers. Future of information and communication conference, 494511, 2020. Ruilin li started to play accordion when she was 7 years old. Linear cryptanalysis is one of the two most widely used attacks on block ciphers.
Sign up linear cryptanalysis attack on a 4 round spn cipher. One property they have is that even if one has some corresponding plaintext and ciphertext, it is not at all easy to determine what key has been used. In this paper, a platform named peigen is presented to evaluate security, find efficient software hardware implementations, and generate cryptographic sboxes. Ruilin li new zealand professional profile linkedin. The motivation of curating a list of cryptography and cryptanalysis related tools was born from desire to have a centralized point where all such tools can be found. Pdf differential fault analysis on shacal1 researchgate.
Fast software encryption 20th international workshop, fse. Journal of systems and software vol 84, issue 7, pages 1071. The repository provides demo programs for implementations of basic machine learning algorithms by python 3. Add open access links from to the list of external document links if available. Cryptanalysis ofwidea 39 gaetan leurent invited talk. Fast correlation attacks on grainlike small state stream ciphers and cryptanalysis of plantlet, fruitv2 and fruit80. This task will become increasingly hard as software technology and systems evolve and as the new. This is just a disambiguation page, and is not intended to be the bibliography of an actual person. Author links open overlay panelruilinli chaolijinshusubingsun. Ruilin li senior associate general counsel at university of minnesota. Communication complexity of conditional disclosure of secrets and attributebased encryption. Although relations among other important cryptanalytic approaches. A curated list of cryptography and cryptanalysis related tools and libraries.
Linear cryptanalysis is a known plaintext attack and uses a linear approximation to describe the behavior of the block cipher. Ruilin li is former board member at shanghai wingsung inv mgmt co ltd. By using an algebraic method, the mathematical foundation of square attack is studied in this paper. Practical and provable security against differential and. Linear cryptanalysis simple english wikipedia, the free. Ruilin li national university of defense technology. This book constitutes the thoroughly refereed postconference proceedings of the 20th international workshop on fast software encryption, held in singapore, march 11, 20. In this subsection, we present the impossible differential cryptanalysis of round clefia128 with the whitening layers. Free download, read and cite papers for your scientific research and study.