The invention disclosed here is aimed at enabling a trusted third party to manage user opt-ins which would enable growth of personalized information services, that is, enabling trusted business relationships between three types of entities—an end-user, an information source/provider, and an application service provider/developer—so that they can have a controlled, secure and private exchange of sensitive and/or confidential information. The inventive system has modes of operation recommended based on various conditions, enabling a secure exchange of private information between personal information repository owners and application services providers to enable deliver of personalized services. One mode is Durable Subscription Management, which is used when per transaction approval is not needed, that is, when an end-user has given permission to access data for a given or predefined period of time. A second mode is Per-Transaction Subscription Management Without Logs and a third mode is Per-Transaction Subscription Management With Logs.