Final answer:
The unsafe authentication practice is b) Sharing login credentials. This goes against The Joint Commission and the Department of Health and Human Services guidelines and risks patient confidentiality and data security.
Step-by-step explanation:
The unsafe authentication practices as described by The Joint Commission and the Department of Health and Human Services include the sharing of login credentials. Strong passwords, regularly changing passwords, and using biometric authentication are considered safe practices that enhance security. However, sharing login credentials compromises the security of any system and is a violation of many organizational policies as it creates an opportunity for unauthorized access to sensitive information.
In healthcare settings, maintaining the privacy and security of patient information is not only a matter of best practice but also a legal requirement under laws like the Health Insurance Portability and Accountability Act (HIPAA). Therefore, never share login credentials, as it endangers patient confidentiality and can lead to serious legal consequences.