به نام خدا
Title: Accelerating Pollard’s Rho Algorithm on Finite Fields
Authors: Jung Hee Cheon, Jin Hong , and Minkyu Kim
Abstract: Most generic and memory efficient algorithms for solving the discrete logarithm problem construct a certain random graph consisting of group element nodes and return the solution when a collision is found among the graph nodes. In this work, we develop a technique for traveling through the random graph with- out fully computing each node and also provide an extension to the distinguished point collision detection method that is suitable for this new situation. Concrete constructions of this technique for multiplicative subgroups of the finite fields are given. Our implementations confirm that the proposed technique provides practical speedup over existing algorithms.
Publish Year: 2012
Publisher: Journal of Cryptography - Journal of Springer
Number of Pages: 48
موضوع: میدانهای متناهی، جبر مجرد، رمزنگاری
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: Secret Sharing Scheme Suitable for Cloud Computing
Authors: Satoshi Takahashi Keiichi Iwamura
Abstract: Secret sharing schemes have recently been considered to apply for cloud computing in which many users distribute multiple data to servers. However, when Shamir s(k,n) secret sharing is applied to cloud systems, the amount of share increases more than n times the amount of the secret. Therefore, in this paper we propose a new secret sharing scheme that can reduce the amount of share different from Ramp type secret sharing, suitable for cloud systems, and we prove that it is computationally secure.
Publish Year: 2013
Published in: AINA - IEEE
Number of Pages: 8
موضوع: رایانش ابری، امنیت
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: Decision making with a fuzzy ontology
Authors: Christer Carlsson Matteo Brunelli Jozsef Mezei
Abstract: Knowledge mobilisation is a transition from theprevailing knowledge management technology that has beenwidely used in industry for the last 20 years to a new meth-odology and some innovative methods for knowledge rep-resentation, formation and development and for knowledgeretrieval and distribution. Knowledge mobilisation aims atcoming to terms with some of the problems of knowledgemanagement and at the same time to introduce new theory,new methods and new technology. More precisely, this paperpresents an outline of a fuzzy ontology as an enhanced ver-sion of classical ontology and demonstrates some advantagesfor practical decision making. We show that a number of softcomputing techniques, e.g. aggregation functions and inter-val valued fuzzy numbers, will support effective and practicaldecision making on the basis of the fuzzy ontology. Wedemonstrate the knowledge mobilisation methods with theconstruction of a support system for finding the best availablewine for a number of wine drinking occasions using a fuzzywine ontology and fuzzy reasoning methods; the supportsystem has been implemented for a Nokia N900 smart phone.
Publish Year: 2012
Published in: Soft Computing - Springer
Number of Pages: 10
موضوع: منطق فازی، تصمیم گیری
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حامی دانش بومی ایرانیان
به نام خدا
Title: Information Fusion and Discounting Techniques for Decision Support in Aerospace
Authors: Fiona Browne , Yan Jin , Niall Rooney Hui Wang
Abstract: Decision makers are required to make critical decisions throughout all stages of a life-cycle in large-scale projects. These decisions are important as they impact upon the outcome and the success of projects. In this paper we present an evidential reasoning framework to aid decision-makers in the decision - making process. This approach utilizes the Dezert-Smarandache Theory (DSm) to fuse heterogeneous evidence sources that suffer from levels of uncertainty, imprecision and conflicts to provide beliefs for decision options. To analyze the impact that source reliability and priority has upon the decision making process a reliability discounting technique along with a priority discounting technique are applied. Application of the evidential reasoning framework is illustrated using a Case Study based in the Aerospace domain.
Publish Year: 2012
Published in: INDIN - IEEE
Number of Pages: 6
موضوع: مهندسی هوافضا، سیستمهای تصمیم یار
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: A Cognitive Link Adaptation Strategy with Differentiated Responses on Wi-Fi System-on-Chip
Authors: Taeyoung Lee, Myounghwan Lee, Jaeeun Kang, Kyungik Cho, ChilYoul Hacky Yang, and Scott Seongwook Lee
Abstract: The dynamic change of wireless channel condition causes poor Wi-Fi quality of service. To cope with the channel variation of wireless communication, the essential strategy for the physical layer with multi-rate capability is the link adaptation. However, because definite guidelines for rate changes do not exist, most link adaptation algorithms can misleadingly increase transmission rates. Therefore, we propose a cognitive link adaptation scheme, sensing link adaptation urgency and responding with differentiated rate control such as the long-term rate adaptation with a short-term rate drop. To evaluate the proposed scheme, we implement the link adaptation scheme on Wi-Fi System-on-Chip, applying the optimal HW/SW partitioning technique to reduce the SW processing delay from heavy operating calculation for the algorithm. The experiment shows that the proposed algorithm increases the packet arrival rate in a real Wi-Fi environment by reducing transmission failure due to wrong rate changes.
Publish Year: 2013
Published in: CCNC - IEEE
Number of Pages: 6
موضوع: شبکه های بی سیم
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان