>Would it be able to get the key from the usb device? Or does the hashing happen on the device itself with the private key never exposed? If you could extract

>Would it be able to get the key from the usb device? Or does the hashing happen on the device itself with the private key never exposed? If you could extract the key, you probably have access to the intelligence resources of a very large nation. With hardware security dongles, the key remains on the dongle; you pass your data in and it passes the signature (or encrypted data) back out.