Time-lock puzzle box

Cicada

Seal a message behind honest, non-parallelizable compute. Whoever opens it must burn real CPU time to read it — no password, no server, no shortcut. Emerges when the work is done.

Your sealed message
0/240
How long should it take to crack?
A novelty lock, honestly: it's real, non-parallelizable compute, but solve time varies by hardware (phones are slow; a native solver is faster than a browser) — so "~60s" is a ballpark, not a guarantee. The message never leaves your browser; the link carries only the ciphertext + the puzzle.

RSW sequential-squaring time-lock (poseidon-free): key = SHA-256(g2^T mod N), AES-GCM. Fresh N per message, no trusted setup, wallet-less. The math is open — a native solver just does the same T squarings faster.