PSE (Privacy Stewards of Ethereum)
Ethereum privacy research, cryptography, and public-goods lab
PSE, now Privacy Stewards of Ethereum, researches and builds open-source privacy and programmable-cryptography public goods for Ethereum. The team began in 2018 as Applied ZKP, adopted Privacy & Scaling Explorations in 2021, and refined its public mission in 2025; it is supported by the Ethereum Foundation but is not presented here as an Ethereum Foundation office.