The Ben-Or, Goldwasser, and Widgerson protocol [1] allows for multi-party secure function evaluation in an environment relying on:
Honest but curious operation: Honest in that every party is obliged to follow the protocol. Curious in that all parties try to find out as much about the other parties as possible.[2]
Pairwise secure channels which exist between parties
Synchronous communication: Each party waits until it receives all messages for a given round before sending messages for the next round.
The RSA Conference 2019 Cryptographers’ Panel was probably the most legit panel I have ever had the privilege of attending. Tal Rabin, awarded this morning the Award for Excellence in Mathematics, claimed it would cost $250,000 to 51% attack Bitcoin for 1 hour. Tal Rabin, your math is wrong! That number is actually on the order of 1000 times too small.