disclaimer: The question may seem a bit holivar, but still.
I accompany the samopisnuyu tiketnuyu system, but in its design it was not taken into account that some customers sometimes have tickets containing a trade secret. Now, any user can read the text of any ticket that is in operation, and in this regard, the task was to somehow organize the confidentiality of some tickets.
How do ITSM work with confidential information? How can I properly resolve the situation?