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Sierra/SolidMechanics 5.6 Verification Tests Manual

Bergel, Guy L.; Beckwith, Frank; De Frias, Gabriel J.; Manktelow, Kevin; Merewether, Mark T.; Miller, Scott T.; Parmar, Krishen J.; Shelton, Timothy R.; Thomas, Jesse E.; Trageser, Jeremy; Treweek, Benjamin; Veilleux, Michael G.; Wagman, Ellen B.

Presented in this document is a small portion of the tests that exist in the Sierra / SolidMechanics (Sierra / SM) verfication test suite. Most of these tests are run nightly with the Sierra / SM code suite, and the results of the test are checked versus the correct analytical result. For each of the tests presented in this document, the test setup, a description of the analytic solution, and comparison of the Sierra / SM code results to the analytic solution is provided. Mesh convergence is also checked on a nightly basis for several of these tests. This document can be used to confirm that a given code capability is verfied or referenced as a compilation of example problems. Additional example problems are provided in the Sierra / SM Example Problems Manual. Note, many other verfication tests exist in the Sierra / SM test suite, but have not yet been included in this manual.

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TYPE SAND Report YEAR 2022
DOIOSTI

A Review of Technologies that can Provide a 'Root of Trust' for Operational Technologies

Karch, Benjamin; Rowland, Mike

The supply chain attack pathway is being increasingly used by adversaries to bypass security controls and gain unauthorized access to sensitive networks and equipment (e.g., Critical Digital Assets). Cyber-attacks targeting supply chain generally aim to compromise the environments, products, or services of vendors and suppliers to inject, add, or substitute authentic software and hardware with malicious elements. These malicious elements are deemed to be authentic as they arise from the vendor or supplier (i.e., the supply chain). This research aims at providing a survey of technologies that have the potential to reduce exposure of sensitive networks and equipment to these attacks, thereby improving tamper resistance. The recent advances in the performance and capabilities of these technologies in recent years has increased their potential applications to reduce or mitigate exposure of the supply chain attack pathway. The focus being on providing an analysis of the benefits and disadvantages of smart cards, secure tokens, and elements to provide root of trust. This analysis provides evidence that these roots of trust can increase the technical capability of equipment and networks to authenticate changes to software and configuration thereby increasing resilience to some supply chain attacks, such as those related to logistics and ICT channels, but not development environment attacks.

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TYPE SAND Report YEAR 2022
DOIOSTI
Results 8126–8150 of 99,299
Results 8126–8150 of 99,299