An information request is a standardized procedure of one party asking another party to provide information. An information request can contain and combine a request for verified credentials, self-attested information and knowledge free evidence:
Verified presentations: Credentials or parts thereof (individual attributes) are presented. These have been issued by an issuer and can be verified by third parties.
Self-attestation: The data is inserted by the user and is not verified by a third party or issuer. Answers for self-attested information can be inserted by the user as desired.
Knowledge-free evidence: Verify a statement with regard to the fulfilment of thresholds, which are above, below, equal to, greater than or less than the selected value. This feature is currently limited to numerical values and is also known as “zero knowledge proof”.
Credential request via a verified presentation:
- An information request, which requests the user to present one or multiple credentials is called a credential request. If the user decides to answer the request the wallet of the user creates a verified presentation.
- A credential request can ask for all or only a particular set of attributes from a credential.
- A credential request can combine multiple attributes from multiple credentials in one request.
- Should the user not be in possession of at least one credential requested the credential request can’t be answered.