Thomas Vannet

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Dinur and Shamir have described cube attacks at EUROCRYPT '09 and they have shown how efficient they are on the stream cipher Trivium up to 767 rounds. These attacks have been extended to distinguishers but since this seminal work, no better results on the complexity of key recovery attacks on Trivium have been presented. It appears that the time complexity(More)
Over recent years, many Private Information Retrieval (PIR) schemes have been designed aiming for computational efficiency and overall real-world practicality. In particular, some preprocessing techniques have been studied to reach those goals. Our main contribution is a new preprocessing technique that reduces overall computation and communication and(More)
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