As digital identity ecosystems evolve, the ability to issue and verify digital credentials in a secure, privacy-preserving, and interoperable manner has become increasingly important. Verifiable Credentials (VCs) offer a W3C-standardized way to present claims about a subject, such as identity attributes or qualifications, in a tamper-evident and cryptographically verifiable format. Among the emerging formats, Selective Disclosure JSON Web Tokens (SD-JWTs) stand out for enabling holders to share only selected parts of a credential, while ensuring its authenticity can still be verified.
In this article, we demonstrate the issuance and presentation of Verifiable Credentials using the SD-JWT format, leveraging Spring Boot microservices on the backend and a Kotlin-based Android application acting as the wallet on the client side.
