However, information theoretic security cannot always be achieved. The cryptography, security, and applied mathematics csam group conducts research on theoretical and practical aspects of cryptography, computational complexity, formal approaches to system and software security, data mining and machine learning with applications to security, and number theory. The problem of intelligence its nature, how it is produced by the brain and how it could be replicated in machines is a deep and fundamental problem that cuts across multiple scientific disciplines. Computational security subject to source constraints, guesswork and inscrutability. This book rectifies this shortage and provides readers a comprehensive discussion on what every security professional. Shannons information theory shan48, shan491 does not take into account the amount of computing power at the enemys dis posal. Guesswork subject to a total entropy budget mural maynooth. Permission, as indicated by the signatures and dates given below, is now granted to submit final copies to the college of graduate studies for approval. Guesswork can also be used to quantify computational security against. Leveraging recent results from its analysis, we extend the remit and utility of the framework to the quantification of the computational security for multiuser systems. Guessing, renyi entropy, shannon entropy, predictability.
Indeed, for a long time, the simple fact that a cryptographic algorithm had withstood cryptanalytic attacks for several years was considered as a kind of validation. A characterization of guesswork on swiftly tilting curves arxiv. As part of the syngress basics series, the basics of information security provides you with fundamental knowledge of information security in both theoretical and practical aspects. Unfortunately, there are too few resources available that can provide a clear and comprehensive understanding of infosec. We consider an abstraction of computational security in password. A growing research into the economics of information security 9, 10 during the last decade aims to understand security problems in terms. Multiuser guesswork and brute force security ieee xplore.
Computational science is critical to mps goalsthemes. He served on the program committees of many international conferences, including icdt, foiks, esorics and ifip wg 11. The complexity of information security is oftentimes overwhelming to those individuals new to the field. R enyi minentropy 25,27, guessing entropy 21, and marginal guesswork 24.
Threat level writes about the release of a denial of service tool for ssltls web servers. Computational intelligence, cyber security and computational models. Theory on passwords has lagged behind practice, where large providers use backend smarts to survive with imperfect technology. A system is called computationallysecure if it is secure against an adversary with reasonably. Taking the guesswork out of computational estimation jill cochran and megan hartmann dugger computational estimation is an important skill necessary for students mathematical development. Professors qiangfei xia and jianhua joshua yang of the electrical and computer engineering ece department have published yet another in a long series of papers in the prestigious family of nature academic journals, this one in the latest issue of nature electronics. Information security is required to protect organization data from information security threat such as virus and unauthorized users.
Springer, 2006, 173184 chapter in book refereed abstract en n this paper, we start to investigate the security implications of selective encryption. Information security is increasingly seen as not only ful. In a fundamental sense, shannons definition of entropy captures the notion of information in situations where unlimited computing power is always available. Roughly speaking, this means that these systems are secure assuming that any adversaries are computationally limited, as all adversaries are in practice. Let us consider a person alice who would like to send a secret message to. The tool, released by a group called the hackers choice, exploits a known flaw in the secure socket layer ssl protocol by overwhelming the system with secure connection requests, which quickly consume server resources. Simplistic models of user and attacker behaviors have led the research community to emphasize the wrong threats. To be able to perform an analytical and more exact description of security, quantitative security measures are desirable. Proceedings of icc3 2015 this book aims at promoting highquality research by researchers and practitioners from academia and industry at the international conference on computational intelligence, cyber security, and computational models icc3 2015 organized by psg college of technology, coimbatore, india during. Two proposed quantitative security measures are entropy and guesswork.
The basics of information security gives you clearnontechnical explanations of how infosec works and how to apply these principles whether youre in the it field or want to understand how it affects your career and business. Students who can estimate well for computations rely on an understanding of. Metrics, advances in information security, volume 23, pages 173184. To accomplish this selective encryption can be used, which provides confidentiality by only encrypting chosen parts of the information. Information security research and development strategy. In general, we are engaged in a bridgebuilding exercise between category theory and computer programming. The common idea in these informationtheoretic approaches is that a system can be seen as a channel in the. Index terms guesswork, computational security, renyi entropy. Cyber security is a complex concept that depends on the domain knowledge and requires cognitive abilities to determine possible.
Guesswork and entropy as security measures for selective encryption. Creative commons attributionnoncommercialshare alike. Computational intelligence, cyber security and computational. Medard, efficient coding for multisource networks using gacskorner common information, 2016 international symposium on information theory and its applications isita, monterey, ca, 2016. However, for small computing devices it might be necessary to reduce the computational cost imposed by security in order to gain reasonable performance and or energy consumption. Handbook of computational group theory crc press book. Graph theory, social networks and counter terrorism. Leadership styles and information security compliance. Leveraging recent results from its analysis, we extend the remit and utility. Pursuing computer science at uk the uk college of engineering department of computer science was ranked 30th among u. The guesswork problem was originally motivated by a desire to quantify computational security for single user systems. Our e orts are a rst attempt at connecting the abstract mathematics with concrete programs, whereas.
Improving information security practices through computational intelligence presents an overview of the latest and greatest research in the field, touching on such topics as cryptology, stream ciphers, and intrusion detection, and providing new insights to an audience of students, teachers, and entrylevel researchers working in computational. As a result, in applications such as cryptography, where computational cost plays a central role, the classical information theory does not provide a totally satisfactory framework. Any opinions, findings, conclusions, or recommendations expressed. Author jason andress gives you the basic knowledge needed to understand the key concepts of confidentiality, integrity, and availability, and then dives into practical applications of these ideas in the areas of. The cryptosystem is considered cryptanalytically unbreakable if the adversary does not have enough information to break the encryption.
The discipline of computer science has many challenging. Said of a cipher that cannot be broken with the current computer technology within a period short enough to be practicable. Instead of pushing through a major you dont like, or adding time and expense by changing majors, you can make an. Iii reine lundin, thijs holleboom, and stefan lindskog. We give the exact conditions for general sfe and mpc to be possible for informationtheoretic security with negligible error.
Science and titled applications of computational intelligence in critical infrastructures. Information theoretic security is a cryptosystem whose security derives purely from information theory. Taking the guesswork out of computational estimation. Oct 25, 2011 threat level writes about the release of a denial of service tool for ssltls web servers. Computer science and engineering, karmayogi engineering college, shelve, pandharpur, maharashatra, india. Informationtheoretic security is a cryptosystem whose security derives purely from information theory. Passwords and the evolution of imperfect authentication.
Although most generalpurpose symbolic algebra programs can handle groups to a certain extent, there are two systems which are particularly well suited for computations with groups. Students who can estimate well for computations rely on an understanding of many mathematical topics. Proceedings of icc3 2015 this book aims at promoting highquality research by researchers and practitioners from academia and industry at the international conference on computational intelligence, cyber security, and computational models icc3 2015 organized by psg college of technology, coimbatore, india during december 17. Since the appearance of publickey cryptography in the diffiehellman seminal paper, many schemes have been proposed, but many have been broken. A characterization of guesswork on swiftly tilting curves. Guesswork is the subject of this thesis, both in the original setting described above as well as in generalized scenarios. Instead, computer scientists rely on reductions to formally relate the hardness of a new or complicated. Guesswork can also be used to quantify computational security against bruteforce attack 16. In this paper, the two ece researchers and their research team described their construction and operation of a three. The new second edition has been updated for the latest trends and threats, including new material on many infosec subjects. Abstract we consider an abstraction of computational security in password protected systems where a user draws a secret string of given length with i. On the other hand, the theory of computational complexity is not yet well enough understood to prove the computational security of public key cryptosystems ldh761. In proceedings of the 5th international workshop on security in information.
Cryptography is a very exciting and developing area of contemporary mathematics, with connections to number theory and computational complexity. Author jason andress gives you the basic knowledge needed to understand the key concepts of confidentiality, integrity, and availability, and then dives into. Pdf quantifying the computational security of multiuser. Given such objects, and thus computational assumptions about the intractability of the inversion without possible trapdoors, we would like that security could be achieved without extra assumptions. Guesswork subject to a total entropy budget arman rezaee, ahmad beirami, ali makhdoumi, muriel medard, and ken duffy.
Research and development concerning information security is closely connected with japans science and technology strategy. He has done research in recursion and complexity theory, information systems with an emphasis on database schema design, query optimization and mediation, and various aspects of security. As shannon entropy is not a good measure of average guesswork, what is the. A decision analyst uses quantitative models and computational methods to formulate decision algorithms, assess decision performance, identify and evaluate options, determine tradeoffs and risks, evaluate strategies for investigation, and so on. Computational group theory cgt is one of the oldest and most developed branches of computational algebra.
We give the exact conditions for general sfe and mpc to be possible for. Massey 1 proved that the shannon entropy of xn, hxn, is a lower bound. The common idea in these information theoretic approaches is that a system can be seen as a channel in the. It is not known how to prove unconditional hardness for essentially any useful problem. International symposium on information theory, aachen, 2017 s. Security measurements and metrics ed dieter gollmann, fabio massacci and artsiom yautsiukhin, boston.
Coprincipalinvestigator copi michael zink and senior research scientist eric lyons of the electrical and computer engineering ece department were key members of the multidisciplinary team from umass amherst and three other institutions that created the dynamic networkcentric multicloud platform, or dynamo, a weatherforecasting device which won two awards at the inaugural scinet. The function of federal advisory committees is advisory only. The handbook of computational group theory offers the f. The origins of computation group theory cgt date back to the late 19th and early 20th centuries. On renyi entropies and their applications to guessing attacks in.
Ken duffy curriculum vitae research interests fields. Suppose that a secret string is drawn from a given process on a. Motivated by both lossless compression and brute force searching, in a brief paper in 1994 it was massey 39 who rst framed this question of. We do this by using the measure guesswork, which gives us the expected number of guesses that.
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