LogonKey is software that allows users to securely log into their Mac using a USB key instead of a password. It protects data by requiring the USB key to be inserted to access the Mac. LogonKey allows users to easily lock their Mac by simply unplugging the USB key. It also prevents password cracking by excluding the need for users to have passwords at all. The software provides password-free login and secure locking of Macs through the use of a USB key.