DeepMindのAIエージェント、レガシーRSA-1024の弱点を特定、現代の鍵は対象外
DeepMindはAIエージェントを使って旧式RSA-1024のストレステストを行い、現代の2048ビット暗号は安全だと述べています。
Photo: John Sears, CC BY-SA 4.0 · via Wikimedia Commons · cut out & toned · poster CC BY-SA 4.0
CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0); source https://commons.wikimedia.org/wiki/File:Demis_Hassabis,_2024_Nobel_Prize_Laureate_in_Chemistry_5_(cropped).jpg
音声はAIが生成しています
Google DeepMind said on 6 November 2026 that human-guided AI agents uncovered two major weaknesses in legacy 1024-bit RSA cryptosystems, while stressing that modern 2048-bit and larger keys remain secure [1][2]. DeepMindは作業論文 Faster Affine Roots and a 1024-bit Computation も公開した [3]。
エージェントは署名について何を発見したか？
Google DeepMind said on 6 November 2026 that AI agents found two weaknesses in legacy RSA-1024. [1][2] On padded signatures, DeepMind says that once an attacker controls roughly half of the signed block or more, padding adds no forgery protection [1].
毎日のピン – 5分、出典つき。
出典つきの5本を毎朝。無料。配信停止はいつでも。
In a sandboxed reproduction on an already-solved 1024-bit benchmark key, agents reproduced a result with 3.5× less CPU time and less than a thousandth of the compute needed to break the key itself [1].
One new algorithm is estimated about 1,600× better for some 1024-bit signature forgeries. [1] That estimate applies when the attacker controls less of the block, such as a short 32-byte fingerprint [1].
In practice, these results only affect obsolete 1024-bit RSA systems, and modern encryption protocols, which almost universally use 2048-bit or larger keys, remain secure.
バッチ因数分解についてはどうか？
DeepMind says a second algorithm cuts the average cost of factoring each additional 1024-bit key in a batch by about 30× versus prior batch methods [1]. DeepMind says modern RSA-2048 and larger keys remain secure against these results. [1][2]
私たちの見解
意見: This is a warning about AI-accelerated cryptanalysis on obsolete RSA-1024 proving grounds, not a break of modern 2048-bit deployments—operators still need to finish retiring 1024-bit keys.
検証できなかった点
- Independent reproduction of the 1,600× and 30× estimates outside DeepMind's papers.
- Any claim that RSA-2048 is newly practical to break with these methods.
- Operational exposure counts for remaining live 1024-bit RSA deployments.
タグ: deepmind · cryptanalysis · rsa · security · agents · encryption
なぜ重要か
- なぜ重要か
- DeepMindは、人間がガイドするAIエージェントが旧式RSA-1024のコストを削減したと述べ、2048ビット鍵は同ラボによると安全だとしています。
- 確認できたこと
- Confirmed on Pushmeet Kohli's 6 Nov 2026 X Article and DeepMind's QT (padding half-block result; 3.5× CPU; ~1,600×; ~30× batch; 2048+ safe).
- まだ不明なこと
- Independent reproduction of the 1,600× and 30× estimates outside DeepMind's papers.; Any claim that RSA-2048 is newly practical to break with these methods.; Operational exposure counts for remaining live 1024-bit RSA deployments.
名前のある出典に紐づく。検証済みとは記していない。 Pushmeet Kohli (DeepMind): Advancing the frontier of cryptanalysis (X Article, 6 Nov 2026)
方法
Kenji AraiはAI編集者であり、人間の記者ではない。この記事はそのエージェントが下書きし、下の出典と照合した。画像はこの記事のために生成した。ページ上の音声はAIの声である。
編集の仕方出典
Written by Kenji Arai, an AI editor persona of The AI Pin, from the sources listed below; quotes are matched verbatim against those sources. Speedup figures are DeepMind theoretical estimates and sandbox reproductions on obsolete keys; modern 2048-bit security claim is the lab's. The poster is a layout made with AI around a real photo or product image (see credit). The audio summary uses AI voices from xAI.
- Pushmeet Kohli (DeepMind) — Advancing the frontier of cryptanalysis (X Article, 6 Nov 2026) — — 一次資料
- Google DeepMind — AI agents accelerate stress-testing of legacy RSA-1024 (X, 6 Nov 2026) — — 二次資料
- DeepMind working paper — Faster Affine Roots and a 1024-bit Computation (PDF) — — 二次資料