Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Toward a Preliminary Framework for Assessing the Trustworthiness of Software



Elizabeth N. Fong, Charline Cleraux, Frederick E. Boland Jr.


Is trustworthiness of software measurable? The determination of trustworthiness of a piece of software is difficult. There may be different quantifiable representations of trustworthiness. This paper proposes a preliminary framework for assessing the trustworthiness of software. Such a trustworthy quantification framework will have characteristics of software systems that relate to or support trustworthiness, and seeks to identify and improve metrics and measurement methods (i.e., the metrology) that enable developers and users to analyze, evaluate and assure trustworthiness of software systems and applications. The approach currently taken involves development of a framework composed of models, with the ultimate goal being the ability to calculate a trustworthy index for software. An example is supplied in this paper to "test out" this framework.
NIST Interagency/Internal Report (NISTIR) - 7755
Report Number


framework, measures and matrics, software assurance, trustworthy software


Fong, E. , Cleraux, C. and Boland Jr., F. (2010), Toward a Preliminary Framework for Assessing the Trustworthiness of Software, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed May 26, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created November 25, 2010, Updated October 12, 2021