Patent ID: 7096365
Filing Date: 2006-08-22
Classification: G06F,G06Q,G07F,H04L

Abstract:
1. A method for generating a digital signature in a signature device having a signature program and certificate with signature key stored thereon for the signing of a document, wherein the digital signature identifies said device and at least one characteristic of the hardware and software environment used for generating said digital signature in said signature device, comprising the steps of: a) receiving input information to said signature device; and b) executing said signature program by the steps of: creating a signature data set comprising at least the received information, an identifier to identify said signature device, at least one identifying characteristic of the hardware and software environment used for generating said digital signature, and a document extract value of the document for signing; and creating an expanded digital signature by encrypting the signature data set with the aid of a signature key stored in said certificate.