Encryption would require a keyboard, which the Sony PRS-505 doesn't have, and which some of the new in-process readers don't seem to have planned. That means encryption would require drastic changes in software or hardware.
An ebook reader is no less secure than the heaps of PPT presentations that are currently handed around in corporate settings. What stops corporations for adopting readers is, more than anything else, the small screens (or the extreme expense of the few with large screens); the first letter/A4-sized ebook reader that can handle PDFs and costs less than $400 will sweep the corporate & litigation landscape.
(If it can also read PPT files, they'll be etched with company logos and forced on new hires who won't have the excuse "the manual was too bulky to carry around, and that's why I haven't read it yet." Twitch. Can we lobby ebook device creators to *not* make them compatible with PowerPoint?)
A letter-sized reader that has more than 10 hours of battery life, enough memory for image-only scanned PDFs, and a decent navigation system, will *own* the litigation support landscape. Encryption's not what's holding that back.
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