If you want to know what is going on in these things, check out www.emvco.com for all of the relevant standards. Dull reading, but nothing is hidden or secret (just the next evolutionary step for credit cards).
As others have said no system is totally secure, but this ups the bar from needing a few household items to clone a mag stripe card to needing millions worth of electron microscopy to clone a smart card.
As others have said no system is totally secure, but this ups the bar from needing a few household items to clone a mag stripe card to needing millions worth of electron microscopy to clone a smart card.