Mastercard Incorporated
Method and system for secure and verifiable offline blockchain transactions

Abstract:

A method for performing secure, verifiable, offline blockchain transactions through a trusted execution environment and time-limited credentials includes: storing, in a trusted execution environment of a computing device, a cryptographic key pair comprised of a public key and a private key; transmitting, by a transmitter of the computing device, the public key to a gateway device in a blockchain network; receiving, by a receiver of the computing device, a time-limited credential from the gateway device; generating, by a processing device of the computing device, a blockchain data value, wherein the blockchain data value includes at least the time-limited credential, a transaction amount, and a destination address; digitally signing, by the trusted execution environment of the computing device, the generated blockchain data value using the private key; and transmitting, by the transmitter of the computing device, the signed blockchain data value to an external device.