Paradigm researcher Dan Robinson proposed PACTs on May 1, 2026. The system enables dormant Bitcoin holders to privately prove they control their addresses. It's a direct move against quantum computing threats that could crack existing keys.
How PACTs Would Function
Robinson's proposal centers on off-chain verification for inactive Bitcoin users. They'd generate a cryptographic proof showing private key ownership without broadcasting public keys. This keeps sensitive data hidden from potential quantum attackers.
Current methods force users to expose public keys when proving ownership. PACTs sidesteps that risk for dormant addresses. It targets wallets that haven't moved funds in years but doesn't affect active users.
Why Dormant Coins Are Vulnerable
Older Bitcoin addresses permanently expose public keys on the blockchain. Dormant wallets have sat with these keys visible for over a decade. Quantum computers could eventually derive private keys from that data.
Active users rotate keys through transactions, reducing exposure. But inactive coins are static targets. PACTs gives those holders a safe verification path before quantum threats materialize.
Technical Review Starts This Week
Robinson plans to share detailed documentation with Bitcoin developers in the coming days. The paper will outline PACTs' cryptographic mechanics for community scrutiny.
Implementation would require protocol changes. Bitcoin consensus moves slowly. Testnet trials might happen later this year if developers back the idea. No firm deadline exists.
Urgency if Quantum Advances
Quantum computing progress is impossible to time. But dormant Bitcoin worth billions sits in vulnerable addresses. PACTs attempts to buy time for migration before keys get cracked.
The proposal won't help if quantum breakthroughs arrive first. Its success depends entirely on getting community buy-in before it's too late. The technical paper drop will show whether it has a fighting chance.
