1. A method for managing content publication, comprising: an encryption controller encrypting only a restricted tag element from among a plurality of content elements to be electronically published as a message for access by a plurality of users, wherein decryption of the encrypted restricted tag element is limited to a selection of at least one user from among the plurality of users; outputting the plurality of content elements for electronic publication through a publication service access interface accessible to the plurality of users, wherein the plurality of users are enabled to access the plurality of content elements of the message published through the publication service access interface, wherein only the selection of at least one user is enabled to decrypt the encrypted restricted tag element in the plurality of content elements to access the underlying restricted tag element within the message published through the publication service access interface; identifying within a message composition interface a particular element within the plurality of content elements as the restricted tag element by a user selecting a selectable option using a restricted tag selection interface to mark a particular content element as a restricted tag; and adjusting within the message composition interface at least one graphical output characteristic of the particular element to graphically distinguish the particular element from the other elements within the plurality of content elements within the published message.