Wave Systems Corp. (fka WAVXQ)

[x-point]

cyper, your smartcard will allow you to access the files that are encrypted on your home mechine.

However you probably won't want to unless the remote computer is also a "trusted PC", and the identity signature and integrity metrics of the unfamiliar machine are acceptable to you. This will require a server infrastructure that will initially be available to enterprise and government users. Providing this service to the general public will be a good business someday for someone. I don't know if Wave has designs on this market directly, but I do hope to see them at least supply some of the underlying tech when the time comes.