Patent ID: 8601247
Filing Date: 2013-12-03
Classification: G06F,H04L

Abstract:
1. A method comprising: providing a number to use as a small-signature private key; computing a signature with a small-signature algorithm; programming, by a manufacturer during the manufacturing of a device, a compressed certificate into a chip-internal non-volatile memory of the device, wherein the compressed certificate includes a device ID, the small-signature private key, an issuer ID, and the signature; enabling, in operation, a calling application to obtain a device certificate generated at the device using the device ID, the small-signature private key, the issuer ID, and the signature of the compressed certificate, wherein the device certificate is a function of the device ID, the issuer ID, the signature, and a public key, wherein the public key is a function of the small-signature private key, and wherein the device certificate is larger than the compressed certificate.