Final answer:
Credential Guard uses Virtualization-based Security (VBS) to block access to the tickets stored within the LSA.
Step-by-step explanation:
The technology used by Credential Guard to block access to the tickets stored within the LSA is Virtualization-based Security (VBS).
VBS is a feature introduced in Windows 10 that provides enhanced security by isolating certain processes and data in a virtualized environment. With Credential Guard, the tickets stored within the Local Security Authority (LSA) process are protected using virtualization-based security, preventing unauthorized access and safeguarding sensitive information.
By leveraging hardware virtualization features, such as Intel VT-x or AMD-V, Credential Guard creates a secure enclave, called the Virtual Trust Level (VTL), to store and protect sensitive information, such as Kerberos tickets.