Hyperledger Ursa (a shared cryptographic library) has moved to end-of-life status, with the components of Ursa still in use moved to their relevant Hyperledger projects (AnonCreds, Indy, Aries and Iroha).
I drew a diagram based on the anoncreds_demo to figure out how to use ursa, but I'm not sure if the issuer will/should know the master secret. According to Indy SDK doc and the demo, a master secret is a special piece of data that’s inserted into a credential in blinded form and is given to issuer directly in plaintext.
The link secret is known only to the Prover. A blinded commitment to the link secret is provided to the Issuer for inclusion into the credential signature.
I drew a diagram based on the anoncreds_demo to figure out how to use ursa, but I'm not sure if the issuer will/should know the master secret. According to Indy SDK doc and the demo, a master secret is a special piece of data that’s inserted into a credential in blinded form and is given to issuer directly in plaintext.![anoncreds_demo](https://user-images.githubusercontent.com/39727212/156971954-4c882ea0-2220-4cea-a617-67a3be3ecfc4.png)