PADO, an acronym for Privacy-Preserving Attestation Data Operator, is at the forefront of cutting-edge cryptography. PADO will use cryptographic algorithms to take the lead in integrating off-chain data into the on-chain world through technologies such as interactive zero-knowledge proof (IZK) and secure multi-party computation (MPC). Compliant, secure, private and verifiable links are ensured, facilitating the creation of interconnected and composable user credentials. PADO's vision is to build a completely decentralized credit protocol centered on users.