Here are some of the major changes from OpenAttestation v2 Data Model
@context property is now introduced as per W3C VC Care Data Model to allow the issuer to map such short-form aliases to the URIs required by specific verifiable credentials and verifiable presentations.
OpenAttestation has released our extension to W3C credentials context via
Previously stored in the
data key, the claims about the subject of the credential are now to be placed in the
Previously mixed into the
data object, additional metadata that are crucial in the role of verification of document integrity or provenance and display of document are now moved into the
Instead of allowing for multiple issuers as found in OA v2, version 3 restricts that there may only be one named
issuer of verifiable credentials. For use cases where there is need for different entities to come together to co-issue the document, the entities will need to choose a way to signal intent from multiple participants on the blockchain
In the previous version, every value in the document is made into a string with a random salt pre-pended as a mean to protect against rainbow table attack on obfuscated value. This results in the need for the
getData method which strips the salt and change the type of the value back to the original type.
In the upgrade, the random salts has been moved to
proof.salts to be pre-pended to the individual values only at the checksum verification stage. This allows the data of the VC to be directly accessible without the