Record your threat and this URL:
View your card here:
The original EoP game is designed to be played with everyone together in a room. Unfortunately, this doesn't work well for open source projects where the contributors are distributed around the globe and need to play asynchronously. This site acts as a virtual card deck.
To speed things up by minimising the wait between players, have each player play more than one card per turn. For example, play three cards per turn.
This site works by seeding a random generator which is used to shuffle a deck of cards (array of numbers). The seed and the position in the deck are authenticated with a SHA-1 HMAC. There is no card secrecy (no encryption) as this version of the game relies on the transparency of the recorded game. All state is stored as a combination of the seed and the card number in the url, nothing is stored by the app.
The original game and instructions can be found here.
For more on threat modelling see: Threat Modeling: Designing for Security