Do you think biometric measurement by employers is ever justified, or does the privacy and security of one's own body always trump the concerns of employers?

Yes, Biometric provides an accurate measurement of the employers and the security of the identification of the human is always considered as true.

Explanation:

Biometric is an electronic system that recognizes the human by scanning the pre-scanned body parts. It scans and compare with the default scanned and then allow for the vitrification.

It measures the login-in and logout-time of the employees in any organization.

The biometric machine is based on finger scanning, face scanning, eye scanning, and voice analysis too.