IEEE 1667 ("Standard Protocol for Authentication in Host Attachments of Transient Storage Devices") is a standard published and maintained by the

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE ...

that describes various methods for authenticating removable storage devices such as

USB flash drive A flash drive (also thumb drive, memory stick, and pen drive/pendrive) is a data storage device that includes flash memory with an integrated USB interface. A typical USB drive is removable, rewritable, and smaller than an optical disc, and u ...

s when they are inserted into a computer. The protocol is universal, and thus operating-system independent. It is currently part of Windows Vista (SP2) and Windows 7, Server 2008, Server 2012, Windows 8, Windows 8.1, Windows 10 and Windows 11.

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