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Giveaway
Check whether a result is legitimate using SHA-256 cryptography
Published hash (before the draw)
Revealed seed (after the draw)
Verify
How does it work?
1
Before the draw, we generate a secret code (seed) and publish only its SHA-256 hash.
2
After the draw, we reveal the seed. Anyone can compute SHA-256 on the seed and compare.
3
If the hashes match, it is mathematically impossible for the result to have been manipulated.
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