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In page Directorate-General for External Security:

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The SDECE and DGSE have been shaken by numerous scandals. In 1968, for example, Philippe Thyraud de Vosjoli, who had been an important officer in the French intelligence system for 20 years, asserted in published memoirs that the SDECE had been deeply penetrated by the Soviet KGB in the 1950s. He also indicated that there had been periods of intense rivalry between the French and U.S. intelligence systems. In the early 1990s a senior French intelligence officer created another major scandal by revealing that the DGSE had conducted economic intelligence operations against American businessmen in France.[1]