Quantum threat to Bitcoin is real, but manageable, according to Wall Street broker Bernstein
The broker said advances in quantum computing are accelerating the timeline for crypto risk, but argued Bitcoin faces a multi-year upgrade cycle, not an existential crisis.
What to know:
- Bernstein warned quantum computing is a growing threat to Bitcoin’s cryptography, with timelines moving closer than previously expected.
- The risk is concentrated in older wallets, while core network functions like mining remain largely secure.
- Bitcoin and crypto have a three to five year window to transition to post-quantum security through protocol upgrades and wallet changes, the broker said.
“Quantum should be seen as a medium to long term system upgrade cycle rather than a risk,” analysts led by Gautam Chhugani said in the Wednesday report.
Quantum computing uses the principles of quantum mechanics rather than classical physics. Instead of binary bits, it relies on qubits that can exist in multiple states at once, a property known as superposition, allowing many possibilities to be processed simultaneously.
Combined with entanglement, this enables quantum systems to solve certain problems, such as breaking encryption, far more efficiently than classical computers.
Quantum computers could eventually weaken cryptographic systems like elliptic curve encryption, which underpin crypto wallets, by solving problems beyond the reach of classical machines. However, the report said the threat spans industries from finance to defense and should be viewed as a manageable, long-term risk rather than an existential one for Bitcoin.
