Patent ID: 11861622
Assignee: MASTERCARD INTERNATIONAL INCORPORATED
Field: IT methods for management (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A system for preventing an unauthorized transaction indicative of scalping, comprising:
a processing server including
a receiver receiving, from a first merchant system, transaction data for a first payment transaction between a consumer and the first merchant system, the transaction data including at least one or more product identifiers associated with one or more products purchased in the first payment transaction and consumer identification data associated with the consumer,
a processor updating a consumer profile stored on a blockchain associated with a blockchain network by generating a new block for the blockchain that includes a blockchain data entry including at least the one or more product identifiers and a public key of a cryptographic key pair associated with the consumer profile, wherein the consumer profile is associated with the consumer and wherein the consumer profile is identified based on at least the consumer identification data, and
a transmitting device, wherein

the receiver of the processing server receives, from a second merchant system different from said first merchant system, a transaction message for a second payment transaction between the consumer and the second merchant, wherein the transaction message includes one or more data values including at least one product identifier included in the one or more product identifiers and at least one consumer data value, and wherein the at least one consumer data value is included in the consumer profile,
the processor of the processing server determines a suspicion score for the consumer profile associated with the consumer, wherein the suspicion score is above a predetermined threshold value,
in response to determining that the suspicion score is above the predetermined threshold value, the processor of the processing server automatically declines, on behalf of the second merchant system, the second payment transaction, and
the transmitter of the processing server transmits an authorization response message for the second payment transaction, wherein the authorization response message includes a response code indicative of rejection of the second payment transaction,
wherein functions of the processing server are performed by on-site interface processors of merchant systems using the blockchain, and wherein the blockchain utilizes self-executable smart contracts to perform said functions.