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1.7M Bitcoin at risk if quantum computers crack public keys, but no current threat exists.

Market News
20 Oct 2026
Tokenpost
View Source
Neutral
1.7M Bitcoin at risk if quantum computers crack public keys, but no current threat exists.

About 1.7 million Bitcoin are estimated to be at risk due to exposure of public keys in an older Bitcoin format called pay-to-public-key (P2PK), which could be vulnerable if future quantum computers can derive private keys from those public keys. Currently, no quantum computer can perform this attack, but the risk highlights the need for quantum-resistant security measures. Wallet provider BitGo has introduced controls to help users manage exposed Bitcoin, and a Bitcoin Improvement Proposal aims to phase out vulnerable signatures, though it is still in draft form.

Bitcoin's legacy outputs face quantum risk. For readers following major cryptocurrencies, here is Pluang's market snapshot as of Oct 21, 2026 07:21 WIB: 44 of 50 major cryptocurrencies rose today. Notable movers include COTI at Rp203 (+4.56%), XTZ at Rp5.626 (+4.03%), and ALGO at Rp2.057 (+3.94%).

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