Network and Communication Setting Sample Clauses

Network and Communication Setting. We consider the same model as in [19, 8, 11], but we explicitly cast it in the multi-player/multi-session world. In other words, we consider a network consisting of n players P1, · · · , Pn. Each ordered pair of players (Pi, Pj) is connected by two unidirectional point-to-point communication channels: (1) an insecure channel, e.g. internet or a Bluetooth or a WiFi channel, over which an adversary has complete control by eavesdropping, delaying, dropping, replaying, and/or modifying messages, and (2) a low-bandwidth out-of-band authenticated (but not secret) channel, referred to as a SAS channel from here on, which preserves the integrity of messages and also provides source and target authentication. In other words, on the insecure channel, an adversary can behave arbitrarily, but it is not allowed to modify (or inject) messages sent on the SAS channel (which we’ll call SAS messages for short), although it can still read them, as well as delay, drop, or re-order them.