There's a real Bitcoin private key (worth $20) in plaintext at app.redactsure.com. You can copy it, paste it, delete it, move it around - full control. But you can't see the actual characters or extract them.
The challenge: Break the protection and take the Bitcoin. First person wins, challenge ends.
Details: - Requires email verification (prevents abuse, no account needed) - 15 minute time limit per session - Currently US only for the demo (latency) - Verify the Bitcoin is real: https://redactsure.com/bitcoinchallenge
Technical approach: - Cloud-hosted browser with real time NER model - Webpages are unmodified - Think of it as selective invisibility for sensitive data. You can interact with it normally, just can't see or extract it
Looking for feedback on edge cases in the hiding/protection algorithm. Happy to answer questions about the implementation.