2025-09-12 –, Plasma Stage
Language: English
Indistinguishability obfuscation (iO) has been seen as the "holy grail" of cryptography, yet it remains far from practical due to the high complexity and inefficiency of existing constructions. In this talk, we will share the current status and challenges of our partial iO implementation and outline our roadmap toward practical iO. We will also show how iO could transform Ethereum into a global platform for privacy-preserving computation, opening the ecosystem to entirely new classes of users.
Indistinguishability obfuscation (iO) has been seen as the "holy grail" of cryptography, turning a program into an “unintelligible” one that hides its internal secrets while preserving its functionality. However, it remains far from practical due to the high complexity and inefficiency of existing constructions.
To bring iO from theory to practice, our project, Machina iO, has proposed a new lattice-based iO construction, Diamond iO, and has released its partial implementation. In this talk, we will share current benchmarks and remaining challenges for the construction and its implementation, along with our roadmap for addressing them. In the long term, we believe that combining Ethereum with iO can make privacy scalable—that is, maintain strong privacy guarantees even as the volume and value of private data grow—thereby unlocking entirely new segments of users for the Ethereum ecosystem.
Sora Suegami is a cryptography researcher and engineer. He began studying blockchain in 2018, and has since focused on researching and developing security technologies centered on cryptography. He co‑founded ZK Email—a project that uses zero‑knowledge proofs to verify contents in emails without revealing them in full—and led the development of several on‑chain protocols built on ZK Email, particularly for email account recovery. Additionally, he has been researching cryptographic theory. In 2025