File
attributes are specific properties of a file. You
can use two file attributes when defining data
identifiers, namely, file type and file size. For
example, a software development company may want to
limit the sharing of the company's software
installer to the R&D department, whose members
are responsible for the development and testing of
the software. In this case, the Trend Micro Email Security administrator can create
a policy that blocks the transmission of executable
files that are 10 to 40 MB in size to all
departments except R&D.
By themselves, file attributes are poor identifiers of sensitive
files. Continuing the example in this topic, third-party software
installers shared by other departments will most likely be blocked. Trend Micro therefore
recommends combining file attributes with other DLP data identifiers
for a more targeted detection of sensitive files.
For a complete list of supported file types, see the Data
Protection Lists document at http://docs.trendmicro.com/en-us/enterprise/data-protection-reference-documents.aspx.