The post Quantum Break: Researcher Wins 1 BTC for Largest ECC Attack Ever appeared first on Coinpedia Fintech News
Post-quantum startup Project Eleven has today awarded a 1 BTC ($77,736 at writing time) prize to the independent researcher Giancarlo Lelli for the latest and largest demonstration of a quantum attack on Elliptic Curve Cryptography (ECC).
Using a publicly accessible quantum computer, Lelli successfully derived a 15-bit elliptic curve private key from its public key counterpart in about 45minutes. He used a variant of Shor’s algorithm to crack the elliptic-curve discrete logarithm problem (ECDLP), which is native to the digital signatures of Bitcoin and Ethereum.
The milestone marks a 512x increase in total search space complexity, or 32,768 possible private key combinations, of which only one is true. It also breaks the previous, first-ever 6-bit break, achieved in September 2025 by Steve Tippeconnic.
Quantum computing and blockchain
While remarkable, a 15-b
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