Vitalik Drops a 2-Year Bomb on Lattices — Even the "Quantum-Safe" Ones Aren't Safe From AI 🧮

Ethereum co-founder Vitalik Buterin warned on October 8 that AI-accelerated mathematics could weaken lattice-based cryptography, including schemes widely considered quantum-resistant, within the next two years. In a post on X, Buterin challenged the common assumption that "elliptic curves broken, hashes safe, lattices safe," stating there is a "good chance that the concrete security of lattices will take serious hits from the next two years of AI math advancements." The warning extends beyond quantum-vulnerable systems such as ECDSA to lattice-based schemes including ML-DSA and FHE, which have been promoted as post-quantum alternatives. Cardano, among other crypto projects, has explored lattice-based cryptography in efforts to quantum-proof itself.

Buterin expanded on the reasoning behind the alert, invoking RSA encryption as a precedent for how a seemingly hard problem can yield to accumulated research. "What if there are skeletons in the closet like that?" he asked, ones "we are simply not smart enough to discover, but bots soon will be." He added that if AI compresses "50 years of math in two years," that progress may "very plausibly include a […] level of improvement to our ability to break lattices." Buterin also cautioned that hash-based cryptography, which he views as a stronger near-term option, could theoretically face similar AI-driven risks. As a precaution, he recommended that any lattices in use "significantly increase in size to improve safety" and called on the industry to "minimize our exposure to not just quantum-vulnerable cryptography, but also potentially AI-vulnerable cryptography."

The alert came one day after Ethereum Foundation researcher Justin Drake urged the blockchain industry to "calmly begin planning for 'bunker mode,'" a posture that involves moving funds to addresses whose public keys have not yet been exposed. Drake argued that AI advances in mathematics could plausibly allow encryption to be broken before quantum computers reach the capability often referred to as Q-Day. Buterin endorsed the broader posture while stopping short of urging immediate wallet migration. "I don't recommend anyone scramble to move their funds to new wallets today," he wrote on X, repeating the phrase that drew a sharp response from Cardano founder Charles Hoskinson, who called the warning "panic" and accused Buterin of "bag-holding too much hash-based crypto research."

Industry voices pushed back on the timeline without disputing the underlying concern. "I wouldn't treat Vitalik's two-year scenario as a deadline. The post doesn't demonstrate that these systems have been broken," Ananda Banerjee, founder of analytics firm Charlie Quant Lab, told Decrypt, adding that preparation should be "careful rather than rushed." Isabel Foxen Duke, head of Mara Foundation, a Bitcoin quantum-proofing project, told Decrypt that breaks created by classical methods such as AI could affect cryptography "that are broadly considered quantum secure (e.g. lattice-based cryptography)," making any conservative stance toward post-quantum systems "even more conservative." Buterin's stated mitigations include off-chain multisig confirmations and the use of fresh addresses to limit exposure to potentially AI-vulnerable signature schemes.