[ 源代码： libu2f-host ]
软件包：libu2f-udev（1.1.10-3）
Universal 2nd Factor (U2F) — transitional package
Libu2f is a package for doing Universal 2nd Factor (U2F) host communication and has functionality for the Registration and Authentication operations.
This package is not necessary anymore, and can be safely removed: since udev v244, U2F devices are autodetected without needing 3rd party udev rules.