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{{infobox file format
| name = Trusted Data Format
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| standard =
| url =
[https://www.dni.gov/index.php/who-we-are/organizations/ic-cio
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▲}}{{More citations needed|date=March 2021}}
The '''Trusted Data Format''' ('''TDF''') is a data object encoding specification for the purposes of enabling data tagging and cryptographic security features.<ref name="DNI">{{Cite web|url=https://www.dni.gov/index.php/who-we-are/organizations/ic-cio/ic-cio-related-menus/ic-cio-related-links/ic-technical-specifications/trusted-data-format|title = Trusted Data Format}} {{Dead link|date=April 2025}}</ref> These features include [[Logical assertion|assertion]] of data properties or tags, [[Electronic signature|cryptographic binding]] and [[encryption|data encryption]]. The TDF is freely available with no restrictions and requires no use of proprietary or patented technology and is thus open for anyone to use.
== Overview ==
The TDF Specification is based on a '''Trusted Data Object''' ('''TDO''') which can be grouped together into a '''Trusted Data Collection''' ('''TDC''').<ref name="IAD">{{cite web | url=https://semanticommunity.info/@api/deki/files/27730/Lang-TTC_Biometric_BigData_Conf_fl13.pdf | title=Biometrics: Big data, analytics and biometric-enabled intelligence | archive-url=https://web.archive.org/web/20170718145403/https://semanticommunity.info/@api/deki/files/27730/Lang-TTC_Biometric_BigData_Conf_fl13.pdf | archive-date=2017-07-18}} {{Dead link|date=April 2025}}</ref> 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.<ref name="IAD"/> 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.<ref name="IAD"/> A TDC allows for additional metadata objects to apply to a set of TDOs.
== Implementations ==
The [[United States Intelligence Community]] maintains the IC-TDF, which includes government-specific tagging requirements on top of the core TDF capabilities mentioned above, in an XML Data Encoding Specification.
The [[United States Department of Defense]] uses TDF to implement the [[Department of Defense Discovery Metadata Specification]] (DDMS).
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* [https://www.dni.gov/index.php/who-we-are/organizations/ic-cio/ic-cio-related-menus/ic-cio-related-links/ic-technical-specifications/trusted-data-format US Office of the Director of National Intelligence website on the TDF Specification]
*[https://www.nytimes.com/2014/07/17/technology/personaltech/ways-to-protect-your-email-after-you-send-it.html?emc=edit_th_20140717&nl=todaysheadlines&nlid=68634180&_r=0 Wood, Mollie, ''Easier Ways to Protect Email From Unwanted Prying Eyes'', New York Times, July 16, 2014 video and article]
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[[Category:Cryptography standards]]
[[Category:XML-based standards]]
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