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Status Delivered
Workspace AIX
Created by Guest
Created on Sep 26, 2019

RELATED IDEAS

Enhance performance of AIX Trusted Execution by improving the logic to verify integrity of untrusted files

Trusted Execution (TE) is an AIX security feature for file integrity verification. For performing the integrity check, TE compares the hash value of the files on the system against the pre-calculated hash values stored in its Trusted signature database (TSD). To improve performance, TE includes a logic to avoid calculating the hash value if the previous check was successful and the file is not modified after that. In this RFE we propose to extend the same logic to avoid integrity check even if the previous check was unsuccessful and the file is not modified. Because if the file is not modified then doing an integrity check again will give the same result with unnecessary performance impact.

Idea priority Medium
  • Guest
    Reply
    |     Feb 15, 2021

    .Delivered in 7.2.5

  • Guest
    Reply
    |     Oct 1, 2019

    Besides improving performance, another benefit of this feature is that is would eliminate duplicate messages of failing executables being reported to syslog. So as long as the files that are executed don't change, duplicate syslog messages won't be reported to syslog. Therefore the customer will more easily be able to ascertain the unique set of executables that need to be updated in order to properly meet the trusted execution runtime requirements. This will greatly facilitate TE adoption since configuring and maintaining the TSD to leverage TE's runtime kernel checking will be much easier to accomplish.

  • Guest
    Reply
    |     Oct 1, 2019

    I think this is a great request. However, just to clarify, I think this should be an option. The customer should be able to configure either this recommended new behavior or the legacy behavior. For example: trustchk -p STREAMLINE_CHK=ON would be the new behavior, and the TE default (legacy behavior) would be trustchk -p STREAMLINE_CHK=OFF.

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