The Chief Information Security Officer (CISO) at a large organization has been reviewing some security-related incidents at the organization and comparing them to current industry trends. The desktop security engineer feels that the use of USB storage devices on office computers has contributed to the frequency of security incidents. The CISO knows the acceptable use policy prohibits the use of USB storage devices. Every user receives a popup warning about this policy upon login. The SIEM system produces a report of USB violations on a monthly basis; yet violations continue to occur.
Which of the following preventative controls would MOST effectively mitigate the logical risks associated with the use of USB storage devices?
A . Revise the corporate policy to include possible termination as a result of violations
B . Increase the frequency and distribution of the USB violations report
C . Deploy PKI to add non-repudiation to login sessions so offenders cannot deny the offense
D . Implement group policy objects
Answer: D
Explanation:
A Group Policy Object (GPO) can apply a common group of settings to all computers in Windows domain.
One GPO setting under the Removable Storage Access node is: All removable storage classes: Deny all access.
This setting can be applied to all computers in the network and will disable all USB storage devices on the computers.
Incorrect Answers:
A: Threatening the users with termination for violating the acceptable use policy may deter some users from using USB storage devices. However, it is not the MOST effective solution. Physically disabling the use of USB storage devices would be more effective.
B: Increasing the frequency and distribution of the USB violations report may deter some users from using USB storage devices. However, it is not the MOST effective solution. Physically disabling the use of USB storage devices would be more effective.
C: Offenders not being able to deny the offense will make it easier to prove the offense. However, it does not prevent the offense in the first place and therefore is not the MOST effective solution. Physically disabling the use of USB storage devices would be more effective.
References:
http://prajwaldesai.com/how-to-disable-usb-devices-using-group-policy/