The U.S. Defense Department has decided to cautiously reinstate the use of USB thumb drives and other flash storage-based media. Flash storage -- and devices which use them, including memory sticks, digital cameras, media players, PDAs, and more -- were banned last November after thousands of military computers were infected by various malware, most of which was traced back to thumb drives.

That ban will soon be lifted, at least partially. Robert Carey, chief information officer of the U.S. Navy, said in a blog post that only "authorized individuals" are likely to be given permission to use thumb drives, and even then only for "mission-essential functions." And these won't be personal drives picked up off of Newegg or Best Buy.

"The days of using personally owned flash media or using flash media collected at conferences or trade shows are long gone," Carey said.

Instead, the drives will be "government-owned and procured," and will also contain built-in encryption chips that may require both a password and a fingerprint scan to decrypt the data, among other safeguards that are yet to be worked out.

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