đCreate Status Lists
Create a Verifiable Credential Status List v2021 on-ledger
Credential Status Lists are on-ledger objects which can be used to mathematically derive whether an issued Credential has been revoked, suspended or is still valid.
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Create Status List
Create an on-ledger Verifiable Credential Status List v2021 over REST API.
Update Status List
Update an on-ledger Verifiable Credential Status List v2021 over REST API.
Check Status List
Check an on-ledger Verifiable Credential Status List v2021 to determine whether a particular Credential is revoked or suspended.
Understanding Status List v2021
The Status List 2021 Specification utilises bitstrings to represent whether a Verifiable Credential has been suspended/revoked or not. A bitstring can be thought of as a long list of 1s and 0s, where, if the binary value of the position in the list is 1 (one), the verifiable credential is revoked, if it is 0 (zero) it is not revoked.
Figure 1: Graphic showing the StatusList2021 bitstring
Each issued Credential correlates with a position and index on the bitstring, so that a verifier will be able to correlate the value within the Credential against the public bitstring to ascertain whether the Credential has been revoked or not, using a validate algorithm as well as a bitstring expansion algorithm.
Where is the StatusList usually published?
The issuer keeps a bitstring list of all Verifiable Credentials it has issued. The StatusList is usually published by the issuer in the format of its own Verifiable Credential. This Verifiable Credential is generally hosted publicly on a centralised server or domain to enable third-party read-access.
Where does cheqd store the Status List?
cheqd stores each Status List and subsequent entries on-ledger as DID-Linked Resource versions. This has notable benefits, including the provenance, legitimacy and security of the Status List. For a full list of benefits, see the context for creating DID-Linked Resources.
Alternatives
Below are a list of alternatives for creating cheqd Status Lists.
DID Registrar
Simple setup for building cheqd DIDs into existing applications using REST APIs, building into the Universal Registrar.
Veramo SDK Plugin
The Veramo SDK Plugin is an extension of the Veramo SDK, a JavaScript framework for Trusted Data, adding support for cheqd functionality.
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