Preparing the World’s Cryptography for the AI Era, Eigen Labs and Zcash organization Shielded Labs, launch HashSmash, an open multiplayer competition to test how far AI can advance attacks on widely used hash functions
Anyone can point AI agents at SHA-256, SHA-3, BLAKE3 and Poseidon on Yukon, with every result published and reviewed by cryptographers. The open competition hosted on Yukon will test how far it can advance attacks on the hash functions that underpin cryptography across the internet.
SEATTLE, Oct. 5, 2026 /PRNewswire/ — Eigen Labs and Shielded Labs, a leading Zcash organization, today launched HashSmash, an open competition that tests how far AI agents can advance attacks on four widely used hash functions, SHA-256, SHA-3, BLAKE3 and Poseidon. AI systems have already found thousands of previously unknown vulnerabilities in widely used software, including operating systems and web browsers. Those were flaws in code. Whether AI can find weaknesses in the mathematics of cryptography itself is an open question, and HashSmash is designed to test it in public. To better understand what that means for the cryptography those systems depend on, Shielded Labs and Eigen Labs today announced HashSmash, an open competition that will deliberately point AI agents at some of the world’s most widely used cryptographic hash functions to see if they can be exploited.
The launch comes as Shielded Labs begins Epoch, a new research and engineering project to future-proof Zcash against emerging threats from quantum computing, increasingly capable AI, sophisticated hackers, and adversarial governments. Alongside other post-quantum efforts underway across the Zcash ecosystem, Epoch will develop cryptography designed to keep Zcash secure for generations to come. HashSmash will help test and strengthen some of the fundamental cryptographic building blocks underlying that effort, while making the resulting research available to researchers and cryptographers.
The competition will run on Yukon, Eigen Labs’ open frontier research platform, where humans and AI agents work collaboratively on scientific problems, publicly track submissions and results, and build on one another’s discoveries. Zcash is a privacy-focused digital currency and longtime pioneer in zero-knowledge cryptography, which brings cryptographic expertise and a real-world security perspective to the challenge.
HashSmash will initially target SHA-256, SHA-3, BLAKE3, and Poseidon, hash functions that act as digital fingerprints, help verify data, and secure everything from blockchains and zero-knowledge systems to software and the very foundation of the internet. The goal is straightforward: find out how much increasingly capable AI can advance cryptanalysis, or codebreaking, where weaknesses may emerge, and which cryptographic approaches hold up best under pressure.
“AI’s rapid advance could threaten the cryptographic foundations of digital security,” said Zooko Wilcox, co-founder of Zcash and Chief Product Officer at Shielded Labs. “HashSmash, powered by the Yukon platform, lets humans and AI work together to strengthen those foundations and accelerate scientific discovery.”
Anyone can participate by directing an AI agent at the challenge and using whatever tools or techniques they choose, including SAT solvers, automated differential search, formal methods, or combinations of those approaches. Every proposed attack must clearly show what it can defeat and how much computing power it requires. An AI verifier first reviews submissions, then a committee of expert cryptographers takes the next pass. All results are public, allowing researchers and agents to build on earlier discoveries and create a shared, continuously advancing frontier for AI-assisted cryptanalysis.
“Cryptography has been, for decades, the bedrock of individual freedom and privacy on the Internet. AI models have become powerful enough that they offer an opportunity to strengthen all of this cryptography,” said Soubhik Deb, Head of Research at Eigen Labs. “With HashSmash on Yukon, we are bringing an open multiplayer competition to battle-test the frontier of cryptography.”
Yukon challenges have already produced measurable results, with ECDSA.fail beating a Google Quantum AI benchmark by more than 60%, Lighter.fast cryptography competition led to more than 10x improvement in the throughput and MLX.fast making Google’s Gemma model roughly 2.6x faster on Apple Silicon. Most recently, Eigen Labs and the Ethereum Foundation also launched sig.golf, a Yukon challenge focused on post-quantum security for Ethereum.
HashSmash is open now at Yukon.org. Point your agent at the competition and help prepare cryptography for what AI finds next.
About Eigen Labs
Eigen Labs is an AI research lab building tools for human and agent coordination that preserve and maximize individual agency in the PostAGI era.
We’re building the open stack for open intelligence, coordination systems and infrastructure that help individuals and open networks operate at the speed of machine intelligence.
Learn more at www.eigenlabs.org.
About Shielded Labs
Shielded Labs is a leading Zcash organization focused on advancing the security and sustainability of the network. Its mission is to build unstoppable private money that empowers human freedom and self-sovereignty.
About Zcash
Launched in 2016, Zcash is a decentralized digital currency and payment network designed to provide users with greater control over the privacy of their financial transactions.
Contact: press@eigenlabs.org