3,108 research outputs found
A saga de um clã Xavier
No full textThe book brings together historical memories of the Xavier family, of which the author is a member, and includes everything from the heroic episode between members of the Xavier family and Lampião's gang, to a Xavier family tree and tributes to the members of this family, as well as photographic records of known members. The author rescues and preserves important memories of the family, reconstructing facts that, if told orally, could gradually be erased. The story told by Maria do Socorro Cardoso Xavier is also a way of preserving the memory of Ipueira, reporting on the social life and historical setting of the place, using family narrative.O livro reúne registros de memórias históricas da família Xavier, da qual a autora é membro,
e traz desde o episódio heróico entre membros da família Xavier e o bando de Lampião, à
uma árvore genealógica dos Xavier e homenagens aos membros dessa famílias, além de
registros fotográficos dos membros conhecidos. A autora resgata e preserva memórias
importantes da família, reconstituindo fatos que, contados oralmente, poderiam se apagar aos
poucos. A história narrada por Maria do Socorro Cardoso Xavier também é uma forma de
preservar a memória de Ipueira, relatando sobre a vida social e cenário histórico do lugar,
utilizando da narrativa familiar
Variations on the Author
No full text“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
Sir William Collins and Xavier Herbert
No full textSir William Collins, publisher and Xavier Herbert, author. Hand written comment about the photograph by Xavier Herbert on verso. [Gift of David Rowbotham
Le Traçage Anonyme, Dangereux Oxymore
No full textNicolas Anciaux, Xavier Bonnetain, Anne Canteaut, Véronique Cortier, Pierrick Gaudry, Lucca Hirschi, Steve Kremer, Stéphanie Lacour, Gaëtan Leurent, Matthieu Lequesne, Léo Perrin, André Schrottenloher, Emmanuel Thomé, Serge Vaudenay, Christophe Vuillot Dans le but affiché de ralentir la progression de l'épidémie COVID-19, la France envisage de mettre en place un système de traçage des contacts des malades à l'aide d'une application mobile. Les concepteurs de ce type d'applications assurent qu'elles sont respectueuses de la vie privée. Cependant cette notion reste vague. Nous souhaitons donc contribuer au débat public en apportant un éclairage sur ce que pourrait et ne pourrait pas garantir une application de traçage, afin que chacun puisse se forger une opinion sur l'opportunité de son déploiement.LASE
Beyond quadratic speedups in quantum attacks on symmetric schemes
No full textInternational audienceIn this paper, we report the first quantum key-recovery attack on a symmetric block cipher design, using classical queries only, with a more than quadratic time speedup compared to the best classical attack. We study the 2XOR-Cascade construction of Gaži and Tessaro (EURO-CRYPT 2012). It is a key length extension technique which provides an n-bit block cipher with 5n 2 bits of security out of an n-bit block cipher with 2n bits of key, with a security proof in the ideal model. We show that the offline-Simon algorithm of Bonnetain et al. (ASIACRYPT 2019) can be extended to, in particular, attack this construction in quantum time O(2 n), providing a 2.5 quantum speedup over the best classical attack. Regarding post-quantum security of symmetric ciphers, it is commonly assumed that doubling the key sizes is a sufficient precaution. This is because Grover's quantum search algorithm, and its derivatives, can only reach a quadratic speedup at most. Our attack shows that the structure of some symmetric constructions can be exploited to overcome this limit. In particular, the 2XOR-Cascade cannot be used to generically strengthen block ciphers against quantum adversaries, as it would offer only the same security as the block cipher itself
San Xavier District pedestrian access and safety study : final report
No full textabstract: The San Xavier District of the Tohono O’odham Nation is home to approximately 2,000 people. Numerous others come to the District to visit the San Xavier del Bac Mission Church. The San Xavier District Pedestrian Access and Safety Study is being prepared to improve the walking and bicycling environment on the San Xavier District for Community members and visitors alike. The study is being funded by the Arizona Department of Transportation Multimodal Planning Division’s Planning Assistance for Rural Areas program.Includes bibliographical references
Interview with Xavier Aldana Reyes
No full textXavier Aldana Reyes is Reader in English Literature and Film in Manchester, a founding member of the Manchester Centre for Gothic Studies, and the author of Spanish Gothic: National Identity, Collaboration and Cultural Adaptation (2017) and Gothic Cinema (2019). His publications in Gothic and horror studies include Twenty-First-Century Gothic: An Edinburgh Companion (with Maisha Wester; 2019), Horror: A Literary History (2016) and Digital Horror: Haunted Technologies, Network Panic and the Found Footage Phenomenon (with Linnie Blake; 2015). Aldana Reyes also edited fiction anthologies for the British Library series, Tales of the Weird, including the following titles: The Gothic Tales of H.P. Lovecraft (2018), The Weird Tales of William Hope Hodgson (2019), Promethean Horrors: Classic Tales of Mad Science (2019) and Roarings from Further Out: Four Weird Novellas, by Algernon Blackwood (2019)
Xavier Albó: Memoria, Crónica, Perfil
No full textAuthor historicizes the monumental contribution to the study of Quechua of linguist and anthropologist Xavier Albó. Author recalls Albó's early linguistic and anthropological influence during the late 1960s as a clear inspiration to study Quechua linguistics, the largest indigenous language spoken today in the Americas
Collisions on Feistel-MiMC and univariate GMiMC
No full textMiMC and GMiMC are families of MPC-friendly block ciphers and hash functions. In this note, we show that the block ciphers MiMC-2n/n (or Feistel-MiMC) and univariate GMiMC are vulnerable to an attack which allows a key recovery in operations. This attack, which is reminiscent of a slide attack, only relies on their weak key schedules, and is independent of the round function ( here) and the number of rounds
Quantum Key-Recovery on full AEZ
No full textInternational audienceAEZ is an authenticated encryption algorithm, submitted to the CAESAR competition. It has been selected for the third round of the competition. While some classical analysis on the algorithm have been published, the cost of these attacks is beyond the security claimed by the designers. In this paper, we show that all the versions of AEZ are completely broken against a quantum adversary. For this, we propose a generalisation of Simon's algorithm for quantum period finding that allows to build efficient attacks
- …
