# Attack on Third-Round PQC Algorithm Candidate Knocks It Out

A new cryptographic attack, named "Mythos," has broken a third-round candidate in the NIST post-quantum cryptography standardization process, rendering it unsuitable for further consideration. The attack exploits a structural vulnerability in the algorithm. This development highlights the ongoing challenges in identifying secure quantum-resistant encryption standards.

**Importance:** 4/5

## Sources

### Technology
- [Ars Technica](https://arstechnica.com/security/2026/07/mythos-uncovers-crypto-weaknesses-that-went-unknown-for-years/) — Wed, 29 Jul 2026 22:07:06 +0000