| Thankyou for taking the time to respond, and congratulations on the launch! Aries leverages, Decentralized Identifiers[1] with Verifiable Credentials [2] the "ledger" is where the public keys are stored. eg it could be a permission-ed ledger, similar to SSL certs only known/<want to be known> parties would publish their keys to the chain. Example: Sovrin network [3] Or could be permission-less, maybe focused more towards IoT/whatever Example: ION Network [4] coming out of Microsoft. The ledger is not a requirement to establish an identity as shown with the did:peer [5] method Frankly I think the usage of blockchain was more to get on the marketing bandwagon at the time. Messaging is now moving from "blockchain" to "distributed ledger" 1 - https://www.w3.org/TR/did-core/ 2 - https://www.w3.org/TR/vc-data-model/ 3 - https://sovrin.org/ 4 - https://identity.foundation/ion/ 5 - https://identity.foundation/peer-did-method-spec/index.html |