Pre-boot Authentication

Pre-Boot Authentication (PBA) or Power-On Authentication (POA) serves as an extension of the BIOS or boot firmware and guarantees a secure, tamper-proof environment external to the operating system as a trusted authentication layer. The PBA prevents anything being read from the hard disk such as the operating system until the user has confirmed he/she has the correct password or other credentials.

Read more about Pre-boot AuthenticationBenefits of Pre-Boot Authentication, Authentication Methods

Other articles related to "authentication":

Pre-boot Authentication - Authentication Methods
... The standard complement of authentication methods exist for Pre-Boot Authentication including Something you know (i.e ...