This project defines a standard protocol for secure authentication of dynamically attached devices, such as USB flash drives. The protocol has only an indirect relationship with data integrity/security, and does not directly address that issue. This project enables the secure functionality of devices such as USB flash drives when connected transiently to hosts. New IEEE Standard - Superseded. This project defines a standard protocol for secure authentication and creation of trust between a secure host and a directly attached Transient Storage Device (TSD), such as a USB flash drive, portable hard drive, or cellular phone. The protocol has only an indirect relationship with data integrity/security, and does not directly address issues of authorization and enforcement. The protocol also does not address devices that are attached using a network connection. However, a device that uses a point-to-point wireless connection such as WUSB may comply with this protocol.