1,721,151 research outputs found
Modifikasi sistem kripto Elgamal hasil konstruksi Marc Joye menggunakan General Linear Group
Full text linkPada era revolusi teknologi 4.0, transformasi big data yang dikumpulkanmelalui internet pada segala bidang kehidupan (The Internet of Things)merupakan suatu keharusan. Akan tetapi internet bukanlah media komunikasiyang cukup aman karena rawan terhadap penyadapan informasi oleh pihakpihak yang tidak berhak mengakses informasi tersebut.Kriptografi merupakan salah satu bidang keilmuan untuk menjaga keamananinformasi. Salah satu sistem kripto yang masih digunakan sampai saat iniadalah sistem kripto ElGamal yang diperkenalkan oleh Taher ElGamal . Padasistem kripto ElGamal klasik dan sistem kripto modifikasi ElGamal yangdikontruksikan oleh Marc Joye, masing-masing sistem kripto ini menggunakankonsep bilangan bulat (integer). Fakta ini memotivasi suatu ide untukmenggantikan konsep bilangan bulat (integer) menjadi suatu matriks yangberukuran n n ï‚´ yang dinamakan dengana General Linear Group . Keunggulandari sistem kripto yang diusulkan adalah terdapat ruang plaintext yang lebihbesar dari sistem sebelumnya, sehingga ciphertext menjadi lebih acak dankeamanan pengiriman data menjadi lebih aman.Penelitian ini merupakan jenis penelitian studi literatur. Sedangkan tujuan daripenelitian ini adalah untuk memodifikasi sistem kripto ElGamal hasilkonstruksi Marc Joye menggunakan konsep General Linear Group sehinggadihasilkan suatu modifikasi sistem kripto ElGamal usulan yang lebih aman darisistem kripto ElGamal hasil konstruksi Marc Joye. Untuk itu, pada makalah inidiusulkan suatu modifikasi yang menggabungkan keunggulan dari sistem kriptoElGamal yang dikontruksikan oleh Marc Joye dan prinsip general linear grup.Hasil menunjukkan bahwa modifikasi sistem kripto ElGamal yang dihasilkanharus menggunakan general linear khusus yaitu matriks-matriks sirkulan yanginvertible atas modulo p
How to Use RSA; or How to Improve the Efficiency of RSA without Loosing its Security (Extended Abstract)
No full textPublished in U. Schulte, Ed., ISSE 2002, on CD-ROM, Paris, France, October 2--4, 2002.] Marc Joye and Pascal Paillier Gemplus Card International, France {marc.joye, pascal.paillier}@gemplus.com http://www.gemplus.com/smart/ Abstract. It is striking to observe the progressive explosion of RSA key lengths. Although this trend clearly corresponds to a (legitimate) ever-increasing need for a guaranteed security level, this paper considers alternative, more e#cient, secure implementations of RSA with respect to industrial constraints
On the Security of the Lee-Chang Group Signature Scheme and its Derivatives (Extended Abstract)
No full textPublished in M. Mambo and Y. Zheng, Eds., Information Security, vol. 1729 of Lecture Notes in Computer Science, pp. 47--51, Springer-Verlag, 1999.] Marc Joye 1,## , Narn-Yih Lee , and Tzonelih Hwang Gemplus Card International Parc d'Activites de Gemenos, B.P. 100, 13881 Gemenos, France [email protected] Dept of Applied Foreign Language, Nan-Tai Institute of Technology Tainan, Taiwan 710, R.O.C
Remarks on "analysis of one popular group signature scheme" in Asiacrypt 2006
No full textAt Asiacrypt 2006, Cao presented a putative framing 'attack' against the ACJT group signature scheme by Ateniese et al. This paper shows that the attack framework considered by Cao is invalid. As we clearly illustrate, there is no security weakness in the ACJT group signature scheme as long as all the detailed specifications of the original paper are being followed. Copyright © 2009 Inderscience Enterprises Ltd
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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