You can install a software program like Password Protect USB on the memory stick and safeguard your data. When you plug your stick into a PC, you run the program from your stick, enter the password and access your data.
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http://www.password-protect-software.com/download/password-protect-usb.exe trial version(pay for unlimited version)
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WinSesame is a professional security software enabling you to :
* Protect a file or a folder with a password.
* Make files or folders confidential.
* Prohibit the opening of a file or a folder.
* Protect data on external hard drive, usb, cdrom, network.
* Create virtual safes.
* Make a powerful parental control.
* Transfer confidential data by email.
* Protect files and folders with a keyfile.
* Clean discs against the recovery of residual data.
* Automatically close all the protected folders and files opened.
Maximum efficiency with 6 encryption algorithms available:
* 3 special algorithms with limitless key length:
WNS910, WNS915 and WNS1020 (the most powerful algorithm available today)
* 3 standard public algorithms :
DES, TripleDES (3DES) and AES (designed for the United States Government.)
Easy to use thanks to a main menu containing all the functions and the integration of the program in the context menus of folders.
Flexibility to adapt the program to your needs.
WinSesame works in English, French, Spanish and Portuguese.
downlaod here -
click here