It’s really only useful for offices that use Microsoft Exchange, but if the disgo Xkey works as advertised it could be supremely handy for workers on the go. The fairly-large USB flash drive has a built-in processor, cryptography engine, and either 256MB or 512MB of storage (depending on model). After plugging the Xkey into any interneted computer and entering a name and password, the Xkey will establish a secure SSL VPN connection to your home office Exchange server and fire up the pre-loaded Exchange client, allowing you to do all of your messaging securely on any computer without leaving a trace of your presence. Very slick.
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