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Beacon

Sealed by block

Pick a future Ethereum mainnet block. The unlock page refuses to attempt decryption until the chain has mined that block, then asks for the owner passphrase. The chain decides when, the passphrase decides who.

1. What to seal

2. When it unlocks (block height)

Mainnet head

…

Pick a future Ethereum mainnet block. The open page will refuse to attempt decryption until the chain has mined that block.

3. Owner passphrase

generating…

The chain anchor is a UI gate; this passphrase is the cryptographic seal. Hermetic never sees it. Lose it and the contents are unrecoverable — even after the block is mined.

Ethereum mainnet · ~12s blocks · viem RPC