Privacy
The add-on does not collect any kind of data from users. That includes but is not limited to :
login credentials
users identifiers
diagram data (UML markup)
diagram image preview
any kind of data generated by the user, Confluence or any other add-on(s)
usage statistics
The backend does not have a data storage. It is a pass-through image generation service.
Security
Security is handled by internal development team as well as security researchers incentivized to expose security vulnerabilities through the BugCrowd program.