Final answer:
In 2021, the Safeguards Rule was updated to include the implementation of physical access controls to better protect customer information held by financial institutions.
Step-by-step explanation:
The question you're asking relates to the Safeguards Rule under the Gramm-Leach-Bliley Act (GLBA), which pertains to how financial institutions must protect consumer information. In 2021, one notable addition to the Safeguards Rule was the implementation of physical access controls. This addition mandates that financial institutions must restrict physical access to sensitive customer information and the devices storing this information. A requirement for biometric authentication, mandatory quarterly data audits, and expansion of encryption standards were not among the changes made in 2021. One of the additions made to the Safeguards Rule in 2021 is the requirement for biometric authentication. Biometric authentication is a security measure that uses unique physical or behavioral characteristics, such as fingerprints or facial recognition, to verify a person's identity. By implementing biometric authentication, businesses can add an extra layer of protection to sensitive data and prevent unauthorized access.