Technologies are shown for secure management of personal information data involving storing personal information data in a personal information data block and committing the personal information data block to a personal information data blockchain and authorizing access to the personal information data by a platform entity by storing a platform identifier corresponding to the platform entity in authorized access data. An access request is received from the platform entity that includes the platform identifier for the first platform entity. If the platform identifier is verified to be in the authorized access data, the personal information data is obtained from the personal information data blockchain and returned to the platform entity. In some examples, the authorized access data includes permissions that identify portions of the personal information data that the platform entity can access. In other examples, the authorized access data is secured on an authorized access data blockchain.