KayTrust

KayTrust is a digital identity solution developed by NTT DATA that implements Self-Sovereign Identity principles using blockchain technology. The platform utilizes several key technical standards including the W3C Verifiable Credentials Data Model and defines a custom did:ev method based on Ethereum smart contracts. The core infrastructure includes:

• KayTrust Wallet: A mobile application for users to manage their digital identities and credentials
• KayTrust Provider: An enterprise server suite for credential issuance and management
• Integration with OpenID Connect through their DIDConnect protocol for self-sovereign authentication
• Support for the European Blockchain Services Infrastructure (EBSI) as a conformant wallet solution

The platform has seen notable implementation in Latin America, with a significant deployment at the Lima Chamber of Commerce where it is used for issuing digital Unified Registry Certificates (CUR). This implementation has reportedly optimized certificate delivery time by 50%, handling approximately 900 certificates monthly. The technical architecture leverages the LACChain network, a blockchain initiative led by the Inter-American Development Bank's Innovation Lab, and operates on Microsoft Azure cloud infrastructure.

Key adoption example: The Lima Chamber of Commerce uses KayTrust to issue verifiable digital certificates, processing over 5,000 queries through their virtual platform