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1. (WO2006121322) TRANSACTION METHOD AND VERIFICATION METHOD

Pub. No.:    WO/2006/121322    International Application No.:    PCT/NL2005/000353
Publication Date: Nov 16, 2006 International Filing Date: May 10, 2005
IPC: G06F 1/00
Applicants: DTS LTD.
WARD, Scott, MacDonald
TEL, Teunis
Inventors: WARD, Scott, MacDonald
TEL, Teunis
Title: TRANSACTION METHOD AND VERIFICATION METHOD
Abstract:
In a method for performing an electronic transaction a first transaction part generates a digital signature and an encrypted digital signature. The second transaction party receives both signatures. The second party is enabled to verify the digital signature, but cannot verify or (re)generate the encrypted digital signature. A trusted third party is enabled to verify the encrypted digital signature if the digital signature is also provided, since the trusted third party cannot (re)generate the digital signature. Thus, no other party than the first transaction party can (re)generate both the digital signature and the encrypted digital signature. Therefore, no other party presenting himself as the first transaction party can be verified as being the first transaction party.