Quantum Computing Threatens Bitcoin Security by 2026 Amid Rising Concerns
Written by Ohris M. Greyoon, Blockchain & Crypto Expert
Source: Coinmarketcap
Updated: Dec 25 2025- Resurfacing Quantum Threat: With Microsoft's unveiling of the first quantum chip in 2026, concerns about quantum computing potentially cracking Bitcoin's encryption have resurfaced, although experts believe this risk remains theoretical and unlikely to materialize in the short term.
- Cryptographic Vulnerabilities: Experts highlight that Bitcoin and most blockchain networks rely on public-key cryptography, particularly the elliptic curve digital signature algorithm (ECDSA), which could lead to large-scale theft of funds if quantum computers become viable.
- Data Harvesting Risks: Attackers are already collecting encrypted data using a 'harvest now, decrypt later' strategy, which could render sensitive information readable once quantum technology matures, potentially affecting around 4 million Bitcoin addresses.
- Industry Response Measures: The crypto community is proactively addressing these threats by planning to replace current signature systems with quantum-resistant alternatives, demonstrating heightened awareness of future risks and the need for enhanced security protocols.
About the author
Ohris M. Greyoon
Ohris M. Greyoon holds a Master’s in Computer Science from MIT and has 10 years of experience in blockchain technology and cryptocurrency markets. A pioneer in decentralized finance (DeFi) analysis, he leads Intellectia’s Crypto News, offering cutting-edge insights into digital assets.
