Personal Information Device

You carry with you at all times a small, low powered device that can send a low powered signal to a transmission tower within a few miles. The tower boosts the signal up to a satellite, which relays data you have allowed remote access to, at high speeds. The concept is that could could have all your data, hundreds of gigabytes or more, available remotely on a device no larger than a USB key, which you could interface with a large number of decives. Plug it into someone else's computer and use it like it was your own, never be without an essential document, no need to email your term paper to yourself before you go to print it before class. FOrgot your cell phone? Plug the device into your friend's phone and access all your contacts, use it just like it was your own phone. Ipod? Access you personal music library from anybody's system, anytime. Your world. Truly Connected.

Each device has a unique password you must enter to decrypt the data, so if you lose it you're not forfieting the contents of your hard drive. You could also require biometric security via a fingerpint scanner built into the device, powered by USB or another powered connection.

The strengths are that it is low power, using only a weak signal that could be powered by ambient motion (think perpetual watch), using powered remote towers to boost the signals out to the satellites. It's also not specific, which is good because you can really see a lot of different uses for this device. It's also CHEAP because it's just a reciever and some hardware encryption, the rest is handled by the devices you use it with.

Cons are infrastructure, but cell towers could easily be retrofit with passive signal boosters (isn't that what they are anyways?). The bandwidth needs to be high enough for some good speeds, at least 6mbit, hopefully more, so there might need to be a few more dedicated staellites.