Submitted by admin tede (tede@pucgoias.edu.br) on 2018-02-23T13:46:05Z No. of bitstreams: 1 GEORGE MENDES MARRA.pdf: 13658752 bytes, checksum: 4c09bf4196dca68a2e0d1185b0d83f40 (MD5) / Made available in DSpace on 2018-02-23T13:46:05Z (GMT). No. of bitstreams: 1 GEORGE MENDES MARRA.pdf: 13658752 bytes, checksum: 4c09bf4196dca68a2e0d1185b0d83f40 (MD5) Previous issue date: 2017-12-11 / This Master's thesis addresses the impact on the use of cryptography in communications during the period of the great world wars. As specific objectives we have: To analyze the effect of cryptography in the context of the great world wars; Understand the political significance / power of cryptography in the twentieth century; Analyze the film: "The game of imitation" taking it as a historical source for understanding the logic of cryptography as a mechanism of power; Historize the development of Enigma machine technology and unveil the power elements behind the use of encryption. The problem would be in what way the encryption starts to influence the structures of power and military actions from the discovery of the cipher of the Enigma machine? We have the following hypotheses: Due to the complexity of international relations, from the late nineteenth and early twentieth centuries, communications between allied nations began to be careful not to be discovered by the spies of rivals. From there begins the effort to develop encryption and coding mechanisms that led to the development of encryption machines until the development of the Enigma machine; The second hypothesis would be that the World Wars speeded up the practices of building cipher machines as a way of defending national secrets; The analysis of the film: "The game of imitation" will show us the role of Mathematics and the action of the University in the process of technological creation to unravel "enigmas". / Esta dissertação de Mestrado aborda o impacto no uso da criptografia nas comunicações no período de grandes guerras mundiais. Como objetivos específicos temos: Analisar o efeito da criptografia no contexto das grandes guerras mundiais; Entender o significado político/poder da criptografia no século XX; Analisar o filme: “O jogo da imitação” tomando-o como fonte histórica para o entendimento da lógica da criptografia como mecanismo de poder; Historiar o desenvolvimento da tecnologia da máquina Enigma e desvelar os elementos de poder por detrás do uso da criptografia. A problemática seria de que maneira a criptografia passa a influenciar as estruturas de poder e ações militares a partir da descoberta da cifra da máquina Enigma? Temos as seguintes hipóteses: Devido a complexidade das relações internacionais, a partir do final do século XIX e início do século XX, as comunicações entre nações aliadas passaram a ter o cuidado de não serem descobertas pela espionagem dos rivais. Daí começa o esforço para o desenvolvimento de mecanismos de cifragem e codificação que levaram ao desenvolvimento das máquinas de cifragem até o desenvolvimento da máquina Enigma; A segunda hipótese seria que as Guerras Mundiais agilizaram as práticas de construção de máquinas de cifragem como forma de defesa de segredos nacionais; A análise do filme: “O jogo da imitação” nos mostrará o papel da Matemática e a ação da Universidade no processo de criação tecnológica para desvendamento de “enigmas”.

Une forme de résistance spécifique et méconnue : la continuation du combat contre l’envahisseur allemand menée au sein des services techniques des Transmissions de l’armée française, notamment du Groupement des contrôles radioélectriques (GCR), dès le lendemain de l’armistice de juin 1940, et poursuivie jusqu’à la victoire finale. Une résistance initiée par des officiers des Transmissions au coeur même des institutions de l’Etat français, consistant à communiquer secrètement du renseignement militaire aux Forces alliées. Cette résistance latente débouche, après novembre 1942, sur une résistance active par la formation d’un réseau clandestin, le Service des transmissions nationales (STN), sous l’égide de NAP-PTT, puis sur son intégration, en octobre 1943, sous le nom de « Groupe Romon », au réseau Alliance, ainsi que sur l’entrée de nombreux opérateurs radio du GCR dans divers autres réseaux de résistance.Le cas d’une résistance intérieure, qui a contribué efficacement à la victoire finale des Forces alliées, malgré une répression systématique et féroce de l’occupant. / A specific and hardly known way of resistance: the continuation of the fight against the german invader led within the technical services of Transmissions of French army, especially the Groupement des contrôles radioélectriques (GCR), the Radio control Group, immediatly after the armistice of June 1940 and carried on until the final victory. A resistance at the initiative of Transmission officers, which, at the heart of the institutions of the Etat français, French State, have secretly communicated military intelligence to the allied Forces. This latent resistance leads, after november 1942, up to an active resistance by the implementation of a clandestine network, the Service des transmissions nationales (STN), the National Transmissions Service, under the aegis of NAP-PTT, then to its integration, in october 1943, under the name « Groupe Romon », to the resistance network Alliance, as well as the commitment of numerous GCR transmitters in various other resistance networks.The case of a resistance from the inside which has effectively contributed to the final victory of the Allied, despite a systematic and ferocious repression from the occupant.