In this paper we consider a new and efficient optimistic nonrepudiation protocol. In a non-repudiation protocol, during which Alice wants to transmit a message to Bob, Alice has to send a non-repudiation of origin evidence to Bob (attesting that Alice is at the origin of the transmitted message), and Bob has to send a non-repudiation of receipt evidence to Alice (attesting Bob’s receipt of the ...

The game. Alice and Bob decide to play the following infinite game on the real number line. A subset S of the unit interval [0, 1] is fixed, and then Alice and Bob alternate playing real numbers. Alice moves first, choosing any real number a1 strictly between 0 and 1. Bob then chooses any real number b1 strictly between a1 and 1. On each subsequent turn, the players must choose a point strictly...

In this work, we consider a scenario where two multiple-aperture legitimate nodes (Alice and Bob) communicate by means of Free-Space Optical (FSO) communication in the presence of a multipleaperture eavesdropper (Eve), which is subject to pointing errors. Two different schemes are considered depending on the availability of channel state information (CSI) at Alice: i) the adaptive scheme, where...

Suppose Alice wants to perform some computation that could be done quickly on a quantum computer, but she cannot do universal quantum computation. Bob can do universal quantum computation and claims he is willing to help, but Alice wants to be sure that Bob cannot learn her input, the result of her calculation, or perhaps even the function she is trying to compute. We describe a simple, efficie...

This article challenges the dominant Christian-centered approach to Black religious life by exploring contemporary Womanist Buddhist and practice, writing, thought alongside writings of early East Asian nuns, noting similarities, differences, intersections among between these written accounts. “Reading Between Times” signals ongoing nature this project, particular paper draws heavily upon Kathr...

Prediction markets provide a unique and compelling way to sell and aggregate information, yet a good understanding of optimal strategies for agents participating in such markets remains elusive. To model this complex setting, prior work proposes a three stages game called the Alice Bob Alice (A-B-A) game – Alice participates in the market first, then Bob joins, and then Alice has a chance to pa...

Consider the following problem: Alice wishes to maintain her email using a storage-provider Bob (such as a Yahoo! or hotmail e-mail account). This storage-provider should provide for Alice the ability to collect, retrieve, search and delete emails but, at the same time, should learn neither the content of messages sent from the senders to Alice (with Bob as an intermediary), nor the search crit...