Portugal already has these. Our ID card is a smartcard, and contains a personal X.509 certificate, issued by a national certificate authority (and a bunch more

Portugal already has these. Our ID card is a smartcard, and contains a personal X.509 certificate, issued by a national certificate authority (and a bunch more stuff, like my address or photo). You can use a card reader and standard software to sign legally valid documents. You can login into government websites with it. I'd wager about 80% of ID cards already use the new model. It looks like this:http://4.bp.blogspot.com/_4kQttk9aLQI/TT7-nale3lI/AAAAAAAAACE/ebQLh6RFrNI/s320/CartaoCidadao_f%255B1%255D.jpg http://4.bp.blogspot.com/_4kQttk9aLQI/TT7-nale3lI/AAAAAAAAAC... Its site is: http://www.cartaodecidadao.pt http://www.cartaodecidadao.pt