We show that any quantum algorithm to decide whether a function f : [n] → [n] is a permutation or far from a permutation must make Ω n1/3 /w queries to f, even if the algorith...
We present a variant of Regev’s cryptosystem first presented in [Reg05], but with a new choice of parameters. By a recent classical reduction by Peikert we prove the scheme sema...
Model checking algorithms can report a property as being true for reasons that may be considered vacuous. Current algorithms for detecting vacuity require either checking a quadrat...
Abstract. Devices like PDAs, mobile phones and Smartcards can communicate with each other and to exchange information and they should be made mutually aware of each other. For priv...
Abstract. The World Wide Web is evolving from a platform for information access into a platform for interactive services. The interaction of the services is provided by forms. Some...