Secure storage of payment information on client devices

A computer program product, comprising:

• a non-transitory computer-readable medium having computer-readable program code embodied therein that when executed by a computer processor cause the computer processor to:
• receive, from a client device, a first request to register a payment instrument, the first request comprising at least a payment instrument account number, a verification code, and a user identifier associated with an electronic account record stored on a payment instrument server;
• store the payment instrument account number with the electronic account record associated with the user identifier received in the first request;
• encrypt the verification code with a private encryption key to generate an encrypted verification code;
• communicate, to the client device, the encrypted verification code and executable instructions, the executable instructions when executed by a processor on the client device directing storage of the encrypted verification code in a local storage data structure on the client device;
• delete the verification code and the encrypted verification code from the computer's memory after communication to the client device;
• receive a second request for payment information from a merchant server, the second request comprising at least the user identifier;
• and
• retrieve the encrypted verification code from storage in the local data structure on the client device associated with the user identifier in response to receiving the second request from the merchant server.

A system for the secure storage of payment instrument verification information on a client device, the system comprising:

• a storage device;
• a network device;
• and
• a processor communicatively coupled to the storage and the network device, the processor executing application code instructions that are stored in the storage device and that cause the system to:
• receive a first request to register a payment instrument from a client device, the first request comprising at least a payment instrument account number, a verification code corresponding to the payment instrument account number, and a user identifier, the user identifier being associated with an online electronic account record stored in the storage device;
• store the payment instrument account number in the online electronic account record stored in the storage device and identified by the user identifier;
• encrypt the verification code using one or more encryption keys to generate an encrypted verification code;
• communicate the encrypted verification code and executable instructions to the client device, the executable instructions when executed by a processor on the client device storing the encrypted verification code in a local storage data structure on the client device;
• delete the verification code and the encrypted verification code from the system after communicating the encrypted verification code to the client device;
• receive a second request for payment information from a merchant server, the second request comprising at least the user identifier;
• and
• retrieve the encrypted verification code from storage in the local data structure on the client device associated with the user identifier in response to receiving the second request from the merchant server.