On April 23, the security consulting firm Independent Security Evaluators (ISE) published a document concerning a number of unsound public and private key pairs tied to the Ethereum blockchain. The probability of chance needed to crack 256-bit encryption would take years for hackers to access random private keys. However, ISE recently queried 49,060 ETH transactions which found 732 “weak” public keys, essentially revealing the corresponding private keys.

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732 Private Keys and Discovering the Blockchain Bandit

An independent security consulting firm headquartered in Baltimore, Maryland has recently released a new study concerning “weak keys” found on the Ethereum blockchain. The researchers ISE detail that this trend could be detected on any blockchain implementation that uses public key signing based on ECDSA encryption. According to ISE they devised a scheme that can discover private keys that were generated by using either…

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Source: https://news.bitcoin.com/researchers-find-hundreds-of-ethereum-wallets-at-risk-due-to-weak-key-pairs/