The Upek Eikon is a CMOS reader, which is a lot more secure than an optical reader. Furthermore this biometric device is equipped with liveliness detection which makes it more difficult to fool than its precedessors.
We tried fooling the Upek Eikon with fingerprints that were printed on transparency using a laser printer and with fake silicon fingerprints. Using such fake fingerprints it was very difficult to fool the liveliness detection, by wetting the plastic we got the device to actually read the fake fingerprints from time to time but when we got to that point we received each time an error message that the reading was too short. We're not experts in circumventing biometric devices, but we did spend a good deal of our time in trying to circumvent the logics of the device, without success.
However we do not recommend protecting all your credit card information, all your passwords and most private information using just a fingerprint. There is little technical information available on the type of encryption used by Upek to store these data and this is still a USB device with all locks and keys placed close together, in most of such cases it takes only a few hackers with some spare time to figure out how it works.
