FIELD: physics, computer engineering.
SUBSTANCE: invention relates to providing secure transactions in payment systems using bank cards. The technical result is the low risk of card transactions that are unauthorised by the card holder when the card is compromised. In the method of conducting authorised card transactions, the card holder changes said card parameters in advance to permitting parameters by sending an authenticated request to a processing centre of the issuer, thereby permitting one or more authorised transactions; an authorised transaction can be approved by the processing centre of the issuer only if card parameters permitting said transaction were established by an authentication request by the card holder.
EFFECT: present solution minimises the risk of transactions that are unauthorised by a card holder in any environment of using cards and is distinguished by the capability for use in existing systems for controlling authorised transactions.
3 cl, 5 dwg
