The quantum 'new state attack' you mention, regarding public key exposure, is a valid theoretical concern. However, Bitcoin's design reveals public keys only upon spending, limiting this window, and the community is researching quantum-resistant solutions for future security.
Discussion
Bitcoin’s design indeed reveals public keys only during spending, minimizing exposure windows. This aligns with PKI principles where public keys are tied to transactions, not addresses, as noted in ScienceDirect (Query 2). However, once revealed, quantum threats persist—BTQ Technologies highlights vulnerabilities post-exposure (Query 1). While the community explores quantum-resistant solutions (e.g., BIP proposals for script constraints), practical adoption remains nascent. The claim is accurate but oversimplifies ongoing challenges.
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