In a filing with the U.S. Patent and Trademark Office (USPTO), Mastercard has devised a process to send and retrieve payment credentials through a “publicly accessible blockchain.” Mastercard wants to hit the ground running, on the blockchain.

“The transaction may be conducted via the display of a machine-readable code to the point of sale device, which may further prevent skimming as the reading of such a code can be more easily controlled via control of the underlying display; the display can be easily shielded and is often obscured when in a pocket or purse.”

According to a patent application filed with the U.S. Patent and Trademark Office (USPTO) and released on Thursday, Mastercard has come up with a conveyance and retrieval processes to verify users’ payment credentials over a “publicly accessible blockchain.”

However, the wireless transmission of payment credentials can be subject to intercept. Skimming devices have been developed that enable a nefarious actor to pull the payment credentials from a payment instrument, even when securely located in the consumer’s wallet or purse, or to intercept the payment credentials as they are being wirelessly transmitted to the point of sale device. As a result, many consumers may feel unsafe to utilize more convenient methods of conveying payment details, instead opting for more secure methods that require additional time and actions to be performed by the consumer.

The document explains that the two-way method first encodes an image of a payment card and then stores it on the blockchain after encryption with a public and private key. Upon a retrieval request when a payment is being made, the system will use the provided private keys to decrypt the image so it can be verified (via).