Ethereum Prepares for Quantum Threats with 2029 Deadline
The Ethereum Foundation has set a deadline of December 2029 to prepare for potential quantum threats to its blockchain. This is in anticipation of 'Q-Day', when quantum computers with real-world attack capabilities emerge, posing a significant threat to existing public-key cryptography systems.
No one can accurately predict when Q-Day will arrive, but most credible predictions place it after 2030, possibly much later, and there's also a possibility it may never come. However, the Ethereum Foundation Protocol Team has adopted a conservative engineering assumption: Ethereum's Layer 1 should be prepared in advance for the scenario where Q-Day could arrive as early as 2030.
The team has proposed ensuring that the execution, consensus, and data layers of Ethereum's Layer 1 possess complete quantum-resistance capabilities by December 2029. This goal is not set in stone and will be reassessed in January 2027, incorporating input from external experts.