Quote from: Sarthak on April 13, 2015, 03:00:39 PM

Hello everyone,

Suppose I want to do a giveaway! The Giveawayseekers Give me a ten digit number. So I want to choose a lucky winner(only one winner) and want the winner to be chosen randomly based on the number they provide! I dont exactly know how but I think in this case the ten digit number acts as a client seed! So how do I choose a winner when they give me a ten digit number and I have to do a giveaway based on that. Please provide me the detailed step by step procedure! Thanks

The only fair trustable way is to base it on a number that does not exist yet. For example there might be some astronomical phenomenon, say sunspots, that produce a number to many decimal places and which can be measured by any individual but are not predictable as yet.

So you might say "the ten digits closest to and higher than the ten digits following the decimal on x measure of sunspot activity on y date".