Zama Builder Stories #1 - Five Years With FHE

Builder Stories is a series by Zama that features developers creating confidential applications using the Zama Protocol, with a spotlight on Patricia Ortuño Otero and Joaquin Trujillo, winners of the Zama Developer Program Mainnet Season 1. Their project, Paychain, is a non-custodial, GDPR-compliant payroll system leveraging Fully Homomorphic Encryption (FHE) to process encrypted data end-to-end on a public blockchain. This solution addresses the need for confidentiality in payroll systems, which often struggle with privacy issues when using public chains. Patricia, an expert in FHE since her student days, and Joaquin, responsible for implementation and UI/UX, emphasize designing from the ground up to maintain data confidentiality, aligning with GDPR principles. They highlight the shift from cryptographic challenges to legal and data protection complexities as the main hurdles in developing with FHE. The goal of Paychain is to showcase FHE's transition from experimental research to practical application, encouraging more developers to explore this technology through the Zama Developer Program, which supports innovative builders in creating real-world confidential computing solutions.