Sora Suegami is a blockchain and cryptography engineer at ZK Email. He has researched blockchain protocols since 2018 and has been building applications using zero-knowledge proof (ZKP) since 2020. In 2018, he conducted research and development on a new Layer 1 blockchain protocol in the Mitou Junior program, originating from the government-backed MITOU Program, and was selected as a 2018 Mitou Junior Super Creator. In the following year, he presented his research findings on techniques for sharing security between Layer 1 blockchains at DEVCON 5 in Osaka. Since 2022, he has been working on ZK Email, a project funded by Privacy & Scaling Explorations and 0xPARC. ZK Email is a library that uses ZKP to prove the contents of emails without revealing the entire content. He built ZKP circuits for email verification in Halo2 and led the development of Email Wallet, an account abstraction wallet that can be controlled using emails. Its users can send tokens to a recipient specified by an email address simply by sending an email. You can see detailed information about our ZK Email products here

In addition to the above activities, Sora Suegami has been researching advanced cryptography. In 2022, he proposed a novel cryptographic scheme for privacy-preserving smart contracts Suegami BCRA 2022. In 2023, he and Leona Hioki made a more practical scheme by using signature-based witness encryption Suegami-Hioki Github 2023. Sora Suegami next published a paper on a more efficient signature-based witness encryption, reducing computational and communication costs for signers to constant regardless of the number of ciphertexts Suegami Eprint 2024. These researches will enable more scalable privacy-preserving smart contracts.