Patent ID: 7490240

Claim:
For an electronic signature device comprising a processor, a memory, a user input device including a first signature input device, and a device interface, all communicatively connected by at least one bus, a method of personalizing the electronic signature device to a user, comprising: receiving a digitized written user signature of the user via the first signature input device; generating a prime parameter, a sub-prime parameter, and a base parameter; generating a signing private key; generating a signing public key based on said prime, sub-prime, and base parameters; generating a user public key based on said signing private key and said prime and base parameters; generating a biometric electronic template based on said digitized written user signature; storing said prime, sub-prime, and base parameters, said signing private and public keys, and said biometric electronic template in the memory; and printing a graphic indicium that is based at least in part on at least one of the digitized written user signature of the user, the signing private key, the signing public key, the user public key, and the biometric electronic template.