EP 0972276 A1 20000119 - TRANSACTION SYSTEM
Title (en)
TRANSACTION SYSTEM
Title (de)
TRANSAKTIONSSYSTEM
Title (fr)
SYSTEME TRANSACTIONNEL
Publication
Application
Priority
- EP 98912621 A 19980323
- EP 97302098 A 19970326
- GB 9800883 W 19980323
Abstract (en)
[origin: WO9843211A1] In a digital payment transactions system a broker generates and stores a secret number. The broker then generates a chain of hash values by successive operations of a hash function, using the secret number as the starting value. The broker then issues to the user a digitally encoded value from some way down the chain of hash values. The user generates a coin stick which comprises a chain of hash values starting with the value communicated by the broker. Subsequently, the broker can transfer further value to the user, without generating a new coin stick, by communicating a digitally encoded value from the broker's hash chain which precedes the value originally communicated to the user.
IPC 1-7
IPC 8 full level
G06Q 20/00 (2012.01); G07F 7/08 (2006.01); G07F 7/10 (2006.01)
CPC (source: EP)
G06Q 20/02 (2013.01); G06Q 20/06 (2013.01); G06Q 20/12 (2013.01); G06Q 20/29 (2013.01); G06Q 20/3827 (2013.01); G07F 7/1016 (2013.01)
Citation (search report)
See references of WO 9843211A1
Designated contracting state (EPC)
BE CH DE ES FR GB IE IT LI NL
DOCDB simple family (publication)
DOCDB simple family (application)
GB 9800883 W 19980323; EP 98912621 A 19980323