A method for facilitating propagation of personal data of a user to a personal data subscriber computing system, the method comprising: obtaining, by the personal data subscriber computing system, a personal data subscription from a remote personal data propagation service computing system, wherein the personal data subscription is associated with the personal data subscriber computing system and entitles the personal data subscriber computing system to access one or more of a plurality of personal data items stored on a secure data store communicatively coupled to a personal data manager computing device that is a personal computing device of the user, wherein the plurality of personal data items stored on the secure data store stores personal information about the user including at least one of address information, credit card information and/or bank account information; requesting, by the personal data subscriber computing system, at least one personal data item from the personal data manager computing device, thereby causing the personal data manager computing device to determine, based on information received from the personal data propagation service computing system, whether access by the personal data subscriber computing system to the at least one personal data item of the plurality of personal data items stored on the secure data store is in accord with the personal data subscription associated with the personal data subscriber computing system; and when access by the personal data subscriber computing system to the at least one personal data item has been determined to be in accord with the personal data subscription associated with the personal data subscriber computing system, receiving, by the personal data subscriber computing system, from the personal data manager computing device the at least one personal data item, and initiating, by the personal data subscriber computing system, an electronic commerce transaction based on the received personal data item, wherein the personal data manager computing device, the personal data subscriber computing system, and the personal data propagation service computing system are distinct and remote from one another. obtaining, by the personal data subscriber computing system, a personal data subscription from a remote personal data propagation service computing system, wherein the personal data subscription is associated with the personal data subscriber computing system and entitles the personal data subscriber computing system to access one or more of a plurality of personal data items stored on a secure data store communicatively coupled to a personal data manager computing device that is a personal computing device of the user, wherein the plurality of personal data items stored on the secure data store stores personal information about the user including at least one of address information, credit card information and/or bank account information; requesting, by the personal data subscriber computing system, at least one personal data item from the personal data manager computing device, thereby causing the personal data manager computing device to determine, based on information received from the personal data propagation service computing system, whether access by the personal data subscriber computing system to the at least one personal data item of the plurality of personal data items stored on the secure data store is in accord with the personal data subscription associated with the personal data subscriber computing system; and when access by the personal data subscriber computing system to the at least one personal data item has been determined to be in accord with the personal data subscription associated with the personal data subscriber computing system, receiving, by the personal data subscriber computing system, from the personal data manager computing device the at least one personal data item, and initiating, by the personal data subscriber computing system, an electronic commerce transaction based on the received personal data item, wherein the personal data manager computing device, the personal data subscriber computing system, and the personal data propagation service computing system are distinct and remote from one another.