Researchers Find Vulnerability for Bitcoin, Ethereum, and Ripple Digital Signatures in Faulty Implementations
Researchers recently identified vulnerabilities in cryptographic signatures for Bitcoin, Ethereum, and Ripple, that allowed attackers to calculate private keys and, consequently, steal any crypto in that wallet. In total, the researchers calculated hundreds of Bitcoin private keys and dozens of Ethereum, Ripple, SSH, and HTTPS private keys using this unique form of cryptanalytic attack.It is critical that the software signs each transaction with a different nonce, otherwise hackers can (rather easily) find and calculate the signers’ private key. There is even evidence that hackers continuously monitor the blockchain for these kinds of repeated nonces, extracting money from compromised keys.As stated in the paper, any non-uniformity in the generation of these signature nonces can reveal private key information. Given a sufficient number of signatures, hackers can compute private keys and gain access to a user’s wallet and drain its funds.