Anthropic Demonstrates Practical Key-Recovery Attack on HAWK-256

Anthropic released a new cryptographic research demo on GitHub. The project demonstrates a practical key-recovery attack against the HAWK-256 algorithm. Researchers detail the methodology used to retrieve secret keys. The attack targets the HAWK-256 hash‑based signature scheme. Results show that certain implementations may be vulnerable. The code repository provides scripts and documentation for replication. Anthropic emphasizes the importance of robust cryptographic design. The findings may influence future security assessments of HAWK-256.