Asymmetric Challenge

Guess the 256-bit key. Win $100.

A 256-bit secret is locked behind a public SHA-256 commitment. Your device checks guesses on its own, so there’s no lag for each try. The first verified claim ends the challenge. It’s like the lottery, but you can try 100,000 times per second.

Awaiting your guess.

Infinite mode

Let it try nonstop. Stop it anytime.

Global attempts—

Auto attempts0

Manual attempts0

Total attempts0

Last 5 tried keys

No guesses yet.

Commitment

Challenge ID: DF73EEB2AF26

df73eeb2af26d5fdf62309c75e5c8ae0c0b486bfdc76da7553b8ba605027a74d

Your browser hashes guesses and compares them to this commitment.

Rules & Eligibility

Disclaimer: this site is a fictional demo and not a real prize offering.

No purchase required. One verified winner receives the $100 prize and the challenge ends.

Participation is free and for entertainment. Void where prohibited and subject to local laws.

A claim requires the exact 256-bit secret. The server verifies claims; no per-guess data is stored server-side.