I want to set up "public lottery", in which everyone can see the selection is random and fair. If I only needed one bit, I would use, for example, the LSB of the closing Dow Jones index for that day. The problem is, I need 32 bits. I need a source that is:
- available daily
- visible to the public throughout the world
- not manipulable (by me or anyone else)
- unbiased
- simple
I suppose I could just pick 32 stocks or stock-indices and use the LSB of each, that would be at least difficult to manipulate, and run them through some hash to eliminate any bias toward 0, but that doesn't really qualify as "simple". Other thoughts: some feed of meteorological or seismological data. That would be more difficult to manipulate (much easier to buy a share of stock than to cause an earthquake) but harder to authenticate (since there aren't armies of auditors watching weather data).
Any suggestions?