Centon offers DataStick products that feature encryption/password protection (both software and hardware embedded solutions) – for more information on those products, please refer to the link below.
www.centon.com/products/usb/solutions/data-encryption
For DataStick products that do not feature any built-in encryption options or password protection, this functionality can be added with aftermarket software solutions. There are a myriad of aftermarket solutions available – both paid and free. Here are some links to open-source (free) applications for your USB drive.
TrueCrypt -
www.truecrypt.org
AxCrypt -
www.axantum.com/AxCrypt/
FreeOTFE -
www.freeotfe.org
Other links… (may be paid or free)
download.cnet.com/windows/encryption-software/
Encryptx SecurFlash -
www.encryptx.com
If the above products do not meet your needs, you can also search for other password-protection / encryption solutions for USB flash drives. Try
Google,
Bing,
CNET,
Tucows,
SourceForge, or any number of other search engines.