Mastercard International Incorporated

Ilgin Safak

Olutoyin Oduwole

Ramanan Rajapreyar

Niravkumar Pandya

Bertrand Saby

Vincent Barnaud

Jean-Robert Raynier

A method for consumer-initiated transactions with encrypted tokens includes: storing a first cryptographic key pair comprising an account public key and an account private key, a merchant public key, an account token associated with a transaction account, an account identifier, and an issuing institution identifier; receiving transaction data for a proposed payment transaction including a transaction amount; generating a transaction order including the transaction data; generating a cryptographic checksum for the generated transaction order; generating a digital signature over the cryptographic checksum using the account private key; generating a payment token including the issuing institution identifier, the account identifier, the transaction amount, and the account token; encrypting the payment token using the account private key; and transmitting the encrypted payment token and signed cryptographic checksum to a point of sale device.

Method and system for consumer-initiated transactions using encrypted tokens

A method for maintaining state and event information for all of a user's devices associated in a common location using a blockchain where each block includes an event block and a device block within it, where each event and device block refers to an earlier block of the respective type, resulting in a blockchain-in-a-blockchain architecture. The device and event blocks store data regarding each device associated with a user and events related to the devices/user, respectively. Any time a new event occurs, or a device is registered or removed, a new set of blocks is created, where submissions regarding device changes or events can be made by any participant due to the decentralized and public nature of a blockchain. The result is a system where all data regarding a user's registered devices and events is kept in a common location in a manner that is auditable and verifiable.

Method and system for state associated device identification for digital payments using blockchain technology

A payment token is generated within a token bank identification number (BIN) range, and is linked with an underlying account number of a consumer. A first instance of the token is made available in at least one of a first portable electronic device, a first mobile payment application (MPA), and a first web wallet of the consumer with an associated first primary account sequence number (PSN). A second instance of the token is made available in at least one of a second portable electronic device, a second mobile payment application (MPA), and a second web wallet of the consumer with an associated second primary account sequence number (PSN).

Bin-conserving tokenization techniques generating tokens in reverse order and employing common device pan with differing pan sequence number values across token instances

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White Plains, NY, United States of America

Ilgin Safak