Mythos Preview found a new attack on HAWK after two years of review
Kyrannio · x · 2026-07-29
A new attack cut HAWK’s security margin by half in 60 hours
Anthropic-linked commentary says the HAWK digital signature scheme had already survived two years of expert review, but a previously unknown attack was found by Mythos Preview in just 60 hours. The attack reportedly reduced the scheme’s key strength by about 50%.
The key takeaway is that even heavily reviewed cryptographic schemes can still expose new weaknesses, and fast AI-assisted analysis may be able to surface them much faster than traditional review cycles.
Related event: Anthropic's Claude Finds Weaknesses in HAWK and Reduced-Round AES(39 posts)→
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