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Crypto

Google quantum chip Willow cuts computation errors 40-fold, but bitcoin security threat still distant

Google succeeds in cutting errors in “magic state,” a key resource for quantum computing, to about one-fortieth of the previous level. Its Quantum AI team reports achieving 99.99% logical accuracy using its Willow processor, but the performance remains far from levels needed to crack bitcoin or RSA-2048 encryption. Researchers cite a wide gap in required accuracy and note that Willow has 105 physical qubits, far below estimates for such attacks.

Crypto

Bitcoin quantum defense cost falls to $59; can it protect 6.04 million BTC with exposed public keys

The estimated computing cost to prepare for quantum-computer attacks on Bitcoin has fallen to $59, driven by GPU software optimisation, raising interest in protecting some coins without changing network rules. The figure is simulation-based and excludes network fees, with further verification needed. The approach, called Quantum Safe Bitcoin, aims to secure holdings using hash-based cryptography and puzzles. Concerns persist over coins with exposed public keys, estimated at about 6.04 million BTC.

Crypto

Quantum attack computation cost estimate on bitcoin, ether drops by more than half in two months

Estimates for the core computation cost of a potential quantum-computer attack targeting bitcoin and ethereum have fallen to less than half of previous levels. The work focused on optimising parts of Shor\'s algorithm used to attack secp256k1, a cryptographic scheme shared by both networks. Researchers stressed this does not mean either system can be cracked with current quantum computers, but the faster-than-expected decline in costs is sharpening calls to bring forward security transitions.