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9. Power Settings

One of the main security features with the Hiddn SafeDisk is that the data encryption keys are cleared when

the power to the SafeDisk is lost. This renders the unit useless for an attacker not having the User Key token

and the PIN/passphrase.

Both Sleep and Hibernate will make the machine cut power to the SafeDisk. When power to the SafeDisk is

restored the keys are no longer in the SafeDisk and needs to be retransmitted from the User Card.

Sleep however does not boot from the SafeDisk and therefor the keys are not transferred to the SafeDisk.

Because of this behavior the SafeDisk will be unreadable after returning from Sleep. Hibernate or power off

must be used instead to be able to use the SafeDisk

Sleep mode is under all circumstances a security risk, hence most security aware organizations already have

deactivated sleep mode as a corporate policy.

Hibernate mode is very similar to sleep, but instead of saving your open documents and running applications to

your RAM, it saves them to your hard disk. This allows your computer to turn off entirely, which means once

your computer is in Hibernate mode, it uses zero power. Once the computer is powered back on, it will resume

everything where you left off. It just takes a bit longer to resume than sleep mode does (though with an SSD,

the difference isn't as noticeable as it is with traditional hard drives).

Hibernation with a fully encrypted drive should be acceptable from a security point of view and is supported by

the Hiddn SafeDisk.

9.1 Disable Sleep

9.1.1 Using GPO in Active Directory (IT Admin only)

Start "Group Policy Management" on Domain Controller then edit "Default Domain Policy" or create new Policy

Navigate to: Computer Configuration - Policies - Administrative Templates - System - Power Management -

Sleep Settings

9.1.2 Locally on a Windows Computer

Start "Edit Group Policy (gpedit.msc)"

Navigate to: Computer Configuration - Administrative Templates - System - Power Management - Sleep

Settings

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Hiddn Security AS

Hiddn Safedisk Installation Manual LT02-IM-01-ENG-24.04.2018

http://www.hiddn.no