Managing a database for identification of security features of a device that generates digital signatures includes (a) recording in the database for each of a plurality of devices, (i) a public key of a pair of public-private keys of the device, and (ii) information including security features of the...http://www.google.com.au/patents/US7028185?utm_source=gb-gplus-sharePatent US7028185 - Managing database for identifying to recipients security features of devices generating digital signatures
