Is there a way to encrypt something on Ethereum and “force” decryption at a certain block? Idea is to sidestep not revealing the data. It’s fine if “as of block X, anyone can decrypt”, not just the original sender.

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I wonder if there could ever be a kind of asymmetric key where it’s cheaper to generate the public key, so you could make like a VDF for the private key, and people could race to generate it, but it takes a very concrete minimum time to decrypt?

You can sorta do this by exploiting RANDAO reveals, but you'd have to convince block producers to run additional software.