How does janusSEAL mark documentation which can be utilised by perimeter security systems?

By classifying documents and emails, you can use perimeter security systems to limit the egress of sensitive information.
 
janusSEAL Documents inserts the security classification marking into files as custom document properties. These properties are readable by other systems.
 
If a user attaches a document an email, janusSEAL for Outlook automatically inherits the security classification of the attachment. The user cannot set the email's classification lower than that of any attachment.
 
When the user sends the message, janusSEAL for Outlook inserts the protective marking into the email. The markings are inserted into pre-configured locations in the message, such as the subject line, X-Header and many more. These markings may be interpreted by perimeter security systems, such as email gateways, and filtered accordingly.
 
Further detail describing the structure of the custom document properties is available here, and detail of email markings is available here. (A site account is required to access these links.)
 
A whitepaper discussing the integration of janusSEAL and email gateway filtering is available here.