When: Wednesday, 2014-Mar-12, 11h30-12h00
Where: FCUL-DI, room C6.3.38
Presenter: Luís Brandão
Abstract:
Coin-flipping is a basic cryptographic primitive that allows several parties to decide a common random bit-string. In this smalltalk I’ll talk in high level about a new method for coin-flipping very large bit-strings between two parties. The protocol achieves simulation-based security (a sophisticated notion of security) and improves efficiency over prior protocols. Some minutes of the smalltalk will be reserved for reflection about the security properties that such functionality should satisfy, and when some security properties can or should not be sacrificed in detriment of efficiency.