Win7 BitLocker Go makes u disk multi-layer protection (2)

        After checking "Use the password to unlock the drive", enter a minimum of 8 digits of encrypted password. Of course, in order to reduce the probability of the password being guessed, you'd better include some irregular uppercase and lowercase letters and numbers in the password.

After clicking Next, BitLocker starts asking how to save the recovery key. It should be noted that the key here is not the decryption password entered by the user when decrypting (the decryption password is still the one just set), but the recovery backup used when the password is forgotten or the smart card is lost. Therefore, the usual frequency of use is quite low. Since we mainly encrypt the mobile hard disk, we chose the first item to save the key to the hard disk.

The next operation is much simpler. After confirming, BitLocker starts encrypting the mobile hard disk. However, this process is not as fast as I thought. Take the 512MB small USB flash drive that I tested this time. It took almost 3 minutes. If it is a 10GB, 20GB large-capacity hard disk, the actual time can be imagined. know.

During the encryption process, the system will automatically retain the existing content on the USB flash drive. In other words, you will not find any significant changes in the USB flash drive. But as long as you unplug it and re-plug it into the computer, a password input box will pop up immediately. You can't read any files on the USB flash drive before you enter the correct password.

Before and after the U disk is decrypted, the display on my computer will be different. Before unlocking, a golden lock will be displayed. After unlocking, the small lock will be grayed out. Therefore, we can judge the working state of the USB flash drive at the moment according to the color of the icon.

If your visits are mostly concentrated on a particular computer (such as a corporate office computer), try to tick "Automatically unlock on this computer from now on" and then unlock it. So what is the benefit of doing this? That is, when you plug the USB flash drive into this computer next time, the system will automatically complete the password input and unlock, so that we can use BitLocker as unobstructed as a normal USB flash drive. Encrypted USB flash drive. Of course, this setting does not affect the security of the USB flash drive. If you plug it into another computer, BitLocker will still pop up the previous password input box, which greatly balances the security and convenience.

Of course, this BitLocker is not a panacea. It guarantees that the data in the USB flash drive is not leaked (decryption is extremely difficult), but system-level operations such as formatting cannot be stopped. In other words, even if the U disk falls into the hands of others, it can only be emptied of the data at most, but the data itself will not leak. Of course, as we have seen, if the biggest shortcoming of BitLocker is probably the old-fashioned encryption speed.

Note: The BitLocker operation is completely reversible. If you want to cancel the BitLocker function of the USB flash drive, just unlock the drive first, then enter the “BitLocker” command in the start menu and select it in the BitLocker panel that opens later. "BitLocker Go" → "Turn off BitLocker".

"bitlocker" and "bitlocker to go" functions are special functions of Windows 7, and the practicality is almost zero for XP system