Abstract: Methods and systems for authenticating profile data is described. The method includes obtaining information associated with a commitment (i) generated based on an attribute of a user and (ii) verified via a verification system implementing a zero-knowledge (ZK) proof. The method also includes authenticating an identity of the user, and signing, based on the authentication of the identity of the user, a transaction on a blockchain.

Abstract: Method and systems for maintaining a loyalty scheme or a royalty scheme are described. A method includes receiving a request pertaining to at least one of the loyalty scheme or the royalty scheme and targeted to an attribute of a user. It is then determined that a user profile includes the attribute of the request via a blockchain. In response to determining that the user profile includes the attribute of the request, the request for a product or a service is transmitted to a device associated with the user profile. A response to the request for the product or service is received from the device associated with the user profile. A commitment to the blockchain is then posted based on the response.

Abstract: Advertisement targeting with a secure identity is described. A request pertaining to supplemental content targeted to an attribute of a user is posted from a requesting system to a blockchain. It is then determined that a user profile includes an attribute that matches with the attribute of the request via the blockchain. The supplemental content is then caused to be displayed in response to the determination that the user profile includes the attribute that matches with the attribute of the request and via a user interface of a device associated with a user associated with the user profile.

Abstract: A system for authenticating user identities and exchange data via a blockchain is described. Initially, first data related to a commitment being made by a user is obtained by a client device. The first data is partly based on information identificatory or a characteristic of the user. The first data is sent by the client device to a verification system. The verification system then verifies that the first data corresponds with second data generated using identification documentation of the user. The data representing the commitment to a blockchain is posted by the verification system responsive to a successful verification.

Abstract: Collecting surveys with a secure identity is described. A request (i) pertaining to a survey and (ii) targeted to an attribute of a user is posted from a requesting system to a blockchain. It is determined, via the blockchain, that a user profile includes an attribute that matches with the attribute of the request. The request to a device associated with the user profile is transmitted via the blockchain and in response to determining that the user profile includes the attribute that matches with the attribute of the request. A response to the request is received from the device associated with the user profile. A commitment based on the response to the request is generated to the blockchain. The commitment is transmitted from the blockchain to the requesting system.

Abstract: A system for authenticating user identities and exchange data via a blockchain is described. Initially, first data related to a commitment being made by a user is obtained by a client device. The first data is partly based on information identificatory or a characteristic of the user. The first data is sent by the client device to a verification system. The verification system then verifies that the first data corresponds with second data generated using identification documentation of the user. The data representing the commitment to a blockchain is posted by the verification system responsive to a successful verification.