The Gwart Show | Blockspace Media Getting To The Bottom Of Quantum w/ Rearden
12 snips
Dec 28, 2025 
In this engaging discussion, Brandon Black, known as ReardenCode, delves into the quantum computing threats to Bitcoin. As a computer security engineer and Bitcoin developer, he offers a skeptical yet insightful take on the timeline for potential encryption breaks. Brandon discusses BIP 360 and OP_CAT as solutions, evaluates classical versus quantum attack risks, and ponders the fate of Satoshi's stash. With a balanced view on the hype and actual capabilities of quantum tech, he provides a roadmap for Bitcoin's future resilience against quantum advancements.
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Lab Progress ≠ Real-World Scaling
- Public quantum progress (physical qubits, lower error rates) doesn't yet map to real-world cryptographic scaling.
- The largest quantum factoring published remains trivially small compared to production targets.
Require Demonstrable Scaling Evidence
- Watch for logical-qubit scaling and sustained error-rate improvements before panicking.
- Demand evidence of reproducible generations that map to real cryptographic tasks.
Quantum Demos Often Rely On Preprocessing
- Many claimed demos pre-process the hard part classically and leave an easy subproblem to the quantum device.
- Small published factorizations often hide classical preprocessing that won't scale.
