Bitcoin Proposal BIP 361 Targets Quantum Vulnerable Addresses

A new proposal is raising serious discussion in the Bitcoin world. Developers have introduced BIP 361, a plan designed to protect Bitcoin from future quantum computer threats. The idea is simple but bold. It suggests freezing certain old Bitcoin addresses that may become unsafe in the future.

BIP-361 Proposes Freezing Quantum-Vulnerable Bitcoin Addresses

Bitcoin developers and researchers have proposed BIP-361, which suggests freezing early Bitcoin addresses considered to have quantum vulnerabilities—primarily P2PK addresses with publicly exposed public keys—to… pic.twitter.com/C5zksSnW7l

— Wu Blockchain (@WuBlockchain) April 15, 2026

These are mainly early addresses where public keys are already exposed. If quantum computers become powerful enough. The attackers could use that data to steal funds. So, instead of waiting for a crisis, developers want to act early.

Why Quantum Computers Are a Concern?

Right now, Bitcoin is secure because it uses strong cryptography. But quantum computers could change that. Experts believe that in the coming years, these machines may become powerful enough to break current encryption methods. If that happens, attackers could calculate private keys from public ones. That means they could access and move funds without permission. 

Reports suggest that over 34% of the Bitcoin supply already has exposed public keys. This creates a real risk if quantum technology improves quickly. So, the proposal focuses on reducing this risk before it becomes a problem.

How the Proposal Works?

BIP 361 outlines a clear plan in three phases. First, the network would stop allowing new transactions to vulnerable addresses. This pushes users to move funds to safer wallets. Next, after a set time, the system would block old signature methods. This means vulnerable coins could no longer be spent using outdated security.

Finally, a future step may allow users to recover funds using advanced methods like zero-knowledge proofs. In simple words, the plan gives users time to upgrade. But it also sets a deadline to improve security.

A Push for Users to Upgrade

One key goal of this proposal is to encourage action. Many users still hold Bitcoin in old address formats. Some may not even know the risks. By setting rules and timelines, the proposal creates pressure to move funds to quantum-safe addresses. This is important because upgrading the whole network takes time. Wallets, exchanges and users all need to prepare. Without a clear plan, delays could leave the system exposed.

Debate Around “Freezing” Funds

Not everyone agrees with this idea. Some people are concerned. About the concept of freezing Bitcoin addresses. It goes against the idea of full control and freedom. Others argue that doing nothing is riskier. If quantum attacks happen, large amounts of Bitcoin could be stolen. That could hurt trust in the entire system. So, the debate is simple. Should Bitcoin act early and restrict some funds, or wait and risk a larger problem later?

What Happens Next?

For now, BIP 361 is still a draft. It has not been approved or implemented. However, it shows that developers are thinking ahead. Quantum computing may still be years away. But preparing early could help protect billions of dollars in value. In simple terms, this proposal is about defense, not change for the sake of it. Bitcoin has faced many challenges before. Now, it may be preparing for its next big test.