A USB drive that stores encrypted data. The encryption may be performed by third-party encryption software or the software that comes usb access control with the drive. In either case, the software is configured to encrypt the data before writing to the drive and decrypt after reading.
Although conventional technologies provide secure storage areas, these have several disadvantages. One technology uses a software package to create two partitions, a public partition that anyone can access and an encrypted partition that requires installation of specialized drivers and software for accessing the files on the encrypted protect usb partition. Another technology, such as is implemented in the USB MSC drivers supplied by Cypress Semiconductor Corporation, uses a custom driver and software application to implement the ATA Security Feature of hard drives to protect access to the entire device using a password that is stored on the hard drive itself.
When you later insert the BitLocker To Go encrypted drive in the Windows 7 system, you will immediately be prompted to enter the password, as shown in Figure H. If you wish, you can select the Show Password Characters as I Type Them check usb protect box, so that you can see the letters; otherwise, you’ll see asterisks. After you type the password, you can select the Automatically Unlock on This Computer from Now On check box to store the password in Windows 7’s password cache.