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Trustworthy Composition: The System Is Not Always the Sum of Its Parts

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In this paper, Robert Ellison surveys several profound technical problems faced by practitioners assembling and integrating secure and survivable systems.
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Software Engineering Institute

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Abstract

This document surveys several of the profound technical problems and challenges faced by practitioners in the assembly and integration of secure and survivable systems.

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Ellison, R. (2013, July 31). Trustworthy Composition: The System Is Not Always the Sum of Its Parts. Retrieved September 9, 2026, from https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/.

@techreport{ellison_2013,
author={Ellison, Robert},
title={Trustworthy Composition: The System Is Not Always the Sum of Its Parts},
month={Jul},
year={2013},
institution={Software Engineering Institute, Carnegie Mellon University},
url={https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/},
note={Accessed: 2026-Sep-9}
}

Ellison, Robert. "Trustworthy Composition: The System Is Not Always the Sum of Its Parts." Software Engineering Institute, Carnegie Mellon University. Software Engineering Institute, July 31, 2013. https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/.

R. Ellison, "Trustworthy Composition: The System Is Not Always the Sum of Its Parts," Software Engineering Institute, Carnegie Mellon University. Software Engineering Institute, 31-Jul-2013 [Online]. Available: https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/. [Accessed: 9-Sep-2026].

Ellison, Robert. "Trustworthy Composition: The System Is Not Always the Sum of Its Parts." Software Engineering Institute, Carnegie Mellon University, Software Engineering Institute, 31 Jul. 2013. https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/. Accessed 9 Sep. 2026.

Ellison, Robert. Trustworthy Composition: The System Is Not Always the Sum of Its Parts. Software Engineering Institute. 2013. https://www.sei.cmu.edu/library/trustworthy-composition-the-system-is-not-always-the-sum-of-its-parts/

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