Personal Data Service

Personal Data Service or Personal Data Store (PDS) is a service to let an individual store, manage and deploy their key personal data in a highly secure and structured way. It gives the user a central point of control for their personal information (e.g. interests, contact information, affiliations, preferences, friends). The user's data attributes being managed by the service may be stored in a co-located repository, or they may be stored multiple external distributed repositories, or a combination of both. Attributes from a PDS may be accessed via an API. Users of the same PDS instance may be allowed to selectively share sets of attributes with other users.

Cloud-based PDSes:

PC-based PDSes:

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Wikipedia