# Cryptographer warns AI may break public-key encryption

Digest AI · Society & Work · published 2026-10-09T15:02:29Z

Canonical: https://digestai.news/story/cryptographer-warns-ai-may-break-public-key-encryption

## Summary

He estimated a 1% chance of living in *Minicrypt*—a hypothetical world where encryption is impossible—and a 15% chance of losing confidence in current algorithms. Green argued that AI’s rapid innovation outpaces human ability to update standards, even with AI assistance, making proactive preparation critical.

Green referenced *Minicrypt*, a concept from cryptographer Russell Impagliazzo, to highlight the risk. His post followed recent discussions on AI’s impact on security, including a prior tweet about hard budget caps for AI systems. The warning underscores concerns about AI’s potential to undermine foundational cryptographic practices.

## Key points

- Matthew Green estimates 1% chance of living in *Minicrypt*, where public-key encryption fails
- Green says AI’s pace of innovation outstrips human ability to update encryption standards
- His warning follows debates on AI’s broader security and governance risks, including hard budget caps

## Why it matters

If true, AI-driven cryptanalysis could force a crisis in digital security, requiring urgent updates to encryption protocols and trust in online systems.

## Sources

1. [Quoting Matthew Green](https://simonwillison.net/2026/Oct/9/matthew-green) (Simon Willison, 2026-10-09)

## Cite

Digest AI, "Cryptographer warns AI may break public-key encryption", 9 October 2026, https://digestai.news/story/cryptographer-warns-ai-may-break-public-key-encryption

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