Self-custody wallet combination payment card for payment card network and blockchain transactions

Patent metadata

Field	Value
Publication number	US-12254465-B2
Application number	US-202217889724-A
Country	US
Kind code	B2
Filing date	Aug 17, 2022
Priority date	Aug 18, 2021
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A self-custody wallet combination payment card includes an electronic component with storage, a processor, and a near field communications interface. Two programs are stored at the electronic component and, once provisioned, the electronic component stores one or more blockchain addresses and security keys. The two programs can include a payment application which can interface with point of sale terminals (e.g., following EMV specifications) and a crypto application which has the capability to securely store keys and return a signature for blockchain transaction.

First claim

What is claimed is:

1. A self-custody wallet combination payment card, comprising:
a memory storing a payment application, a crypto application, a blockchain address for a crypto card wallet account, and security keys for a self-custodied wallet;
a processor; and
a near field communications interface for establishing a near-field communication channel;
wherein the crypto application, when executed by the processor, performs:
receiving, via the near-field communication channel and from a mobile application running on a mobile device, a request to create the self-custodied wallet, wherein the request to create the self-custodied wallet comprises authentication information;
validating the authentication information;
creating a private key in an inactive state;
storing the private key in the memory as part of the security keys for the self-custodied wallet;
generating a self-custody blockchain address associated with the private key;
providing the self-custody blockchain address to the mobile application running on the mobile device over the near-field communication channel;
receiving a request to activate the self-custodied wallet from the mobile application running on the mobile device over the near-field communication channel, wherein the request to activate the self-custodied wallet comprises an activation certificate generated by a custody wallet provider associated with the blockchain address for the crypto card wallet account;
activating the wallet by setting the private key to an active state; and
computing and generating a signed transaction request using the stored security keys.

2. The self-custody wallet combination payment card of claim 1 , further comprising a primary account number (PAN) stored at the memory, wherein the PAN is associated with the crypto card wallet account.

3. The self-custody wallet combination payment card of claim 2 , wherein the payment application, when executed by the processor, performs: communicating a payment request to a payment terminal over the near-field communication channel, wherein the payment request comprises the PAN.

4. The self-custody wallet combination payment card of claim 1 , wherein the crypto application performs the computing and generating of the signed transaction request in response to receiving a top-up request for a custodied wallet associated with the blockchain address for the crypto card wallet account from a mobile application over the near-field communication channel.

5. The self-custody wallet combination payment card of claim 4 , wherein the crypto application performs the computing and generating of the signed transaction request using the security keys for the self-custodied wallet, wherein the signed transaction request indicates the blockchain address for the crypto card wallet account as a receiving address.

6. The self-custody wallet combination payment card of claim 5 , wherein the crypto application further performs:
receiving the top-up request for the custodied wallet associated with the blockchain address for the crypto card wallet account from the mobile application over the near-field communication channel, wherein the top-up request comprises authentication information;
validating the authentication information;
formatting a transaction request;
signing the transaction request using the security keys to generate the signed transaction request; and
providing the signed transaction request to the mobile application over the near-field communication channel.

7. The self-custody wallet combination payment card of claim 1 , wherein the crypto application performs the computing and generating of the signed transaction request in response to receiving a self-custodied wallet transaction request from a mobile application over the near-field communication channel.

8. The self-custody wallet combination payment card of claim 7 , wherein the crypto application performs:
receiving the self-custodied wallet transaction request from the mobile application over the near-field communication channel, wherein the self-custodied wallet transaction request comprises authentication information and a receiving address;
validating the authentication information;
formatting a transaction request;
signing the transaction request using the security keys to generate the signed transaction request; and
providing the signed transaction request to the mobile application over the near-field communication channel.

9. A method of operating a self-custody wallet combination payment card, comprising a memory storing a payment application, a crypto application, a blockchain address for a crypto card wallet account, and security keys for a self-custodied wallet, a processor; and a near field communications interface for establishing a near-field communication channel, the method comprising:
receiving, via the near-field communication channel and from a mobile application running on a mobile device, a request to create the self-custodied wallet, wherein the request to create the self-custodied wallet comprises authentication information;
validating the authentication information;
creating a private key in an inactive state;
storing the private key in the memory as part of the security keys for the self-custodied wallet;
generating a self-custody blockchain address associated with the private key;
providing the self-custody blockchain address to the mobile application running on the mobile device over the near-field communication channel;
receiving a request to activate the self-custodied wallet from the mobile application running on the mobile device over the near-field communication channel, wherein the request to activate the self-custodied wallet comprises an activation certificate generated by a custody wallet provider associated with the blockchain address for the crypto card wallet account;
activating the wallet by setting the private key to an active state; and
computing and generating a signed transaction request using the stored security keys.

10. The method of claim 9 , wherein the self-custody wallet combination payment card further comprises a primary account number (PAN) stored at the memory, wherein the PAN is associated with the crypto card wallet account, the method further comprising:
communicating, by the payment application, a payment request to a payment terminal over the near-field communication channel, wherein the payment request comprises the PAN.

11. The method of claim 9 , further comprising:
receiving a top-up request for a custodied wallet associated with the blockchain address for the crypto card wallet account from a mobile application over the near-field communication channel,
wherein the computing and generating the signed transaction request are in response to receiving the top-up request.

12. The method of claim 11 , wherein the signed transaction request indicates the blockchain address for the crypto card wallet account as a receiving address.

13. The method of claim 11 , wherein the top-up request comprises authentication information, wherein in response to the top-up request, the method comprises:
validating the authentication information;
formatting a transaction request;
signing the transaction request using the private key to generate the signed transaction request; and
providing the signed transaction request to the mobile application over the near-field communication channel.

14. The method of claim 9 , wherein the computing and generating the signed transaction request are in response to receiving a self-custodied wallet transaction request from a mobile application over the near-field communicati

Assignees

• Mastercard International Inc

Inventors

• Ahmad Mohammed Sadiq

Classifications

• G06Q20/3825

  Use of electronic signatures · CPC title

• G06Q2220/00

  Business processing using cryptography · CPC title

• H04L9/3247

  involving digital signatures · CPC title

• H04L9/50

  using hash chains, e.g. blockchains or hash trees · CPC title

• G06Q20/3829

  involving key management · CPC title