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In 2020 Sala, Sogiorno and Taufer have been able to find the private keys ofsome Bitcoin addresses, thus being able to spend the cryptocurrency linked tothem. This result was unexpected, since the recovery of non-trivial privatekeys for blockchain addresses is deemed to be an infeasible problem. In thispaper we widen this analysis by mounting a similar attack to other smallsubsets of the set of private keys. We then apply it to other blockchains aswell, examining Ethereum, Dogecoin, Litecoin, Dash, Zcash and Bitcoin Cash. Inaddition to the results, we also explain the techniques we have used to performthis exhaustive search for all the addresses that have ever appeared in theseblockchains.

Special subsets of addresses for blockchains using the secp256k1 curve