Verifiable credentials as promoted by the W3C as well as the Hyperledger projects Indy and Aries can give individuals control of their identity attributes in a privacy-preserving manner. Estainium, an association of manufacturers and trusted technical inspection organizations, extends the use of verifiable credentials for sharing product-level information in supply chains, specifically for letting suppliers cryptographically prove product carbon footprints (PCFs) down-stream while preserving common supply chain confidentiality assumptions. The aim of this PCF sharing infrastructure is to drive production towards trustworthy net zero carbon emission.
