Abstract: The present disclosure relates to off-line generation, storage, and usage of digital assets, such as cryptocurrency. In particular, methods and systems are disclosed for generating off-line cryptographic key pairs for the off-line storage of digital assets using storage techniques that do not involve connecting to the Internet. In one example, a method for generating off-line cryptographic key pairs includes receiving user input from a user, determining a key generation algorithm based on the user input, wherein the key generation algorithm relates to a digital asset, generating an off-line cryptographic key pair based on the user input and key generation algorithm, and outputting the off-line cryptographic key pair.

Abstract: The present disclosure relates to off-line generation, storage, and usage of digital assets, such as cryptocurrency. In particular, methods and systems are disclosed for a system for cold payment of digital assets. In one example, a method for usage of digital assets, such as cryptocurrency, includes receiving at least one public key corresponding to at least one off-line cryptographic key pair, receiving a digital asset, determining a set of amounts for the digital asset corresponding to a user selection, assigning an amount of the digital asset to the at least one public key determined by the set of amounts, and transmitting a payment amount to a payee address corresponding to the user selection.