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Home > Help & Support > Knowledge Base > Security > Highly Sensitive Data FAQ > What is encryption “at rest?”

What is encryption “at rest?”

The only approved and supported method for university computers "at rest" is whole disk encryption used for personal desktop and laptop computers. Servers which have not been approved by the IT Security Office as having sufficient mitigating controls in place should also use encryption.

Whole disk encryption:

  • Protects the entire contents of the hard drive
  • Protects the data from theft when the system is turned off (loss or theft of the computer won’t expose data on an encrypted hard drive)
  • May not protect the data when the system is turned on

The university has an enterprise encryption solution for Windows-based systems. Approval to store sensitive data will trigger a request to have the Windows system encrypted.

Last modified: September 7, 2018

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  • What type of data might appear highly sensitive, but is not subject to the Data Stewardship policy?
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  • What are some examples of encryption “in transport?"

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After October 14, 2025, Microsoft will no longer provide security updates or support for Windows 10 systems. As a result, all Windows 10 systems must be upgraded to Windows 11 or removed from the Mason network. Learn more ⬇️

https://its.gmu.edu/bulletins/microsoft-windows-11-announcement/

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