--- title: Mythos takes its first shot at post-quantum cryptography description: Anthropic's Mythos AI model has helped researchers discover two new cryptanalytic attacks: one that effectively halves the security level of Hawk, a NIST... canonical: https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Mythos takes its first shot at post-quantum cryptography | daily.dev og:description: Anthropic's Mythos AI model has helped researchers discover two new cryptanalytic attacks: one that effectively halves the security level of Hawk, a NIST... og:url: https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t og:image: https://api.daily.dev/og/posts/pItpHvN0T.png og:image:alt: Mythos takes its first shot at post-quantum cryptography og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Mythos takes its first shot at post-quantum cryptography **[CSO Online](https://daily.dev/sources/csoonline)** · 4 min read · 0 upvotes · 0 comments ## Summary Anthropic's Mythos AI model has helped researchers discover two new cryptanalytic attacks: one that effectively halves the security level of Hawk, a NIST post-quantum digital signature candidate, and another using a novel 'Mobius Bridge' technique that speeds up attacks on a reduced-round version of AES-128 by 200-800x. Neither finding threatens deployed systems — Hawk's larger key sizes remain impractical to attack, and the AES attack requires an astronomically impractical number of chosen plaintexts. However, the Hawk finding suggests its proposed key sizes are weaker than originally claimed, potentially reducing its efficiency advantages as a post-quantum candidate. Mythos discovered the Hawk attack in 60 hours and the AES attack in about a week, though validation took two researchers nearly a month. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Anthropic’s Mythos is the cyberthreat every CISO feared](https://daily.dev/posts/anthropic-s-mythos-is-the-cyberthreat-every-ciso-feared-5mg1fqudh) · TechCentral · 0 upvotes · 0 comments - [How Mythos Signals Cybersecurity Disruption](https://daily.dev/posts/how-mythos-signals-cybersecurity-disruption-ng2ydu97n) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#quantum-computing](https://daily.dev/tags/quantum-computing), [#claude](https://daily.dev/tags/claude), [#anthropic](https://daily.dev/tags/anthropic) [View this post on daily.dev](https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Mythos takes its first shot at post-quantum cryptography","url":"https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t"},"datePublished":"2026-07-29T15:18:04.825Z","dateModified":"2026-08-02T19:34:01.754Z","description":"Anthropic's Mythos AI model has helped researchers discover two new cryptanalytic attacks: one that effectively halves the security level of Hawk, a NIST...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ac95abd95ac52305e28cdbecd4199319?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ac95abd95ac52305e28cdbecd4199319?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"CSO Online","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"CSO Online","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/98667e4b5cac46cf9c470819c6cf71cd","url":"https://daily.dev/sources/csoonline"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/mythos-takes-its-first-shot-at-post-quantum-cryptography-pitphvn0t","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"quantum-computing,claude,anthropic","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"CSO Online","item":"https://daily.dev/sources/csoonline"},{"@type":"ListItem","position":3,"name":"Mythos takes its first shot at post-quantum cryptography"}]} ```