Trusted Data Format

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Trusted Data Format
Open TDF Icon.png
Open TDF icon
Filename extension .tdf
Developed by ODNI
Latest release
(Sept 6, 2013)
Extended from XML
Website ODNI TDF Specification

The Trusted Data Format (TDF) is an XML based file format used by the United States Intelligence Community for the purposes of enabling file level tagging and security features.[1] These features include assertion of data properties or tags, cryptographic binding and data encryption. The TDF is open source and requires no use of proprietary or patented technology and is thus free for anyone to use.


The TDF Specification is based on a Trusted Data Object (TDO) which can be grouped together into a Trusted Data Collection (TDC).[2] Each TDO consists of a data payload which can be associated with an unlimited number of metadata objects. The TDO supports the cryptographic binding of the metadata objects to the payload data object.[2] In addition, both data and metadata objects can be associated with a block of encryption information which is used by any TDF consumer to decrypt the associated data or metadata if it had been encrypted.[2] A TDC allows for additional metadata objects to apply to a set of TDOs.


Virtru offers client-side email encryption service based on the TDF specification.[3]


External links[edit]