What to know:
- Bitcoin developers introduced a phased plan that could make old Bitcoin wallets unusable within about five years if not upgraded.
- It aims to protect Bitcoin from quantum attacks that could expose private keys and lead to large-scale fund theft.
Bitcoin developers are preparing the network for a future where quantum computers could break its core security.
A new proposal called Bitcoin Improvement Proposal 361 outlines a plan to gradually replace current signature systems with quantum-resistant alternatives. The proposal introduces a clear plan that would eventually make old wallet unusable if they are not upgraded.
Source: GitHub
The plan focuses on protecting BTC from a future where powerful quantum computers could crack existing cryptography like ECDSA and Schnorr signatures. These systems currently secure Bitcoin transactions, but researchers say they may not be safe in the long term.
According to the proposal, the transition will happen in phases. In the first phase, users will no longer be able to send Bitcoin to older, and quantum-vulnerable addresses. This move is done in order to push for a more newer and safer address types. In the second phase, spending from ‘these older addresses’ will be blocked after a fixed deadline, which according to the new report is expected to come about five years after activation.
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This means that users who fail to upgrade their wallets could lose access to their funds or face serious restrictions. The proposal is designed to create urgency, forcing the entire ecosystem wallet providers, exchanges, and individual holders to act early.
Developers behind the proposal argue that this is necessary because the threat is not theoretical anymore. Advances in quantum computing are accelerating, and some estimates suggest powerful machines capable of breaking current encryption could arrive within the next decade.
Why Bitcoin Needs to Prepare for Quantum Risk
The main concern is that a quantum computer could expose private keys from public keys already visible on the blockchain. A large portion of BTC in circulation has already revealed its public key through past transactions. If quantum technology reaches a high level, attackers could use it to steal funds from these wallets without immediate detection.
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