Cardano founder Charles Hoskinson accused Ethereum co-founder Vitalik Buterin of undermining quantum-resistant cryptography with speculative warnings about AI-driven mathematical breakthroughs. In an Oct. 9 post, Hoskinson challenged Buterin's skepticism toward lattice-based cryptography, arguing that decades of security research had already accounted for the technology's known weaknesses. He warned that encouraging developers to abandon established approaches could slow the adoption of protections already being deployed across internet infrastructure, leaving systems exposed to future quantum attacks. Buterin had previously warned that AI-assisted mathematical discoveries could weaken cryptography designed to resist quantum computers, stating Ethereum's long-term roadmap favors hash-based signatures over lattice-based designs.