Ephemerand – GPS based random number generator

Plug in your GPS device, then run:

If you see version information from your device then it connected OK:

If you wait for a bit you’ll see it pick up satellites (make sure the sky is in view):

After all 31 satellites are picked up you’ll get the current day’s random number:

The first parameter after is the random value. Another approach is to have all the participants who have an interest in the random value to submit a hash of their own personally generated random number. Every participant verifies everyone else’s comitted hashes were computed properly, and then combines the random values into a final random number.

Source: github.com