Adobe has bought the DRM division of CAD software maker Navisware for an undisclosed sum. The purchase will see it expand supported formats to include Microsoft Office.

Adobe will integrate Navisware's FileLine DRM technology with its LiveCycle Policy Server software - used by companies to set security policies for who can access electronic documents and to keep track of who views and edits them.

With Navisware, Adobe will be able to protect documents in native Microsoft Office and CAD formats as well as Adobe's own PDF format.

The FileLine technology also protects documents distributed outside the corporate firewall, Adobe said. And it helps businesses meet compliance regulations by making sure the versions of documents distributed are up to date and by providing an audit log of who accessed documents and when.

The companies were already partners. Navisware said last March that it would make its FileLine products work with LiveCycle Policy Server. Adobe apparently valued the technology enough to buy it. It expects to integrate the FileLine technology with LifeCycle Policy Server in the second half of the year.