A celebrated result by Barak et al (JACM’12) shows the impossibility of general-purpose virtual black-box (VBB) obfuscation in the plain model. A recent work by Canetti, Kalai, and Paneth (TCC’15) extends this result also to the random oracle model (assuming trapdoor permutations). In contrast, Brakerski-Rothblum (TCC’15) and Barak et al (EuroCrypt’14) show that in idealized graded encoding mod...

In a number of observed procurements, the buyer has employed an auction format that allows for a split-award outcome. We focus on settings where the range of uncertainty regarding scale economies is large and, depending on cost realizations, the efficient allocations include split-award outcomes as well as sole-source outcomes (one active supplier). We examine the price performance and efficien...

UAAC/AAUC Recognition Award and Lifetime Achievement 2020 / Le prix de reconnaissance et le pour l’ensemble des réalisations l’UAAC AAUC l’année 2020. Un article la revue RACAR : Revue d'art canadienne Canadian Art Review (Volume 46, numéro 1, 2021, p. 3-134) diffusée par plateforme Érudit.