Magnetic strip modification

A method, comprising:

• generating, by a magnetic strip modification system having at least one processor, a first identifier having a first number of digits;
• encoding, by the magnetic strip modification system, the first identifier on a device;
• receiving, from a first event processing device and by the magnetic strip modification system, the first identifier retrieved from the device during a first event;
• processing, by the magnetic strip modification system, the first identifier to extract a key from the first identifier, the key being a subset of digits in the first identifier and including digits in predetermined positions within the first identifier;
• querying, by the magnetic strip modification system, a database to identify account information of a user for processing the first event, the account information including an account number and the query using as input the key;
• identifying, by the magnetic strip modification system, the account information and process the first event based on the account information;
• generating, by the magnetic strip modification system, a second identifier having the first number of digits, the second identifier including the key;
• and
• modifying, by the magnetic strip modification system, the device to include the second identifier and delete the first identifier.

One or more non-transitory computer-readable media storing instructions that, when executed by a computer system comprising at least one processor, memory, and a communication interface, cause the computer system to:

• generate a first identifier having a first number of digits;
• encode the first identifier on a device;
• receive, from a first event processing device, the first identifier retrieved from the device during a first event;
• process the first identifier to extract a key from the first identifier, the key being a subset of digits in the first identifier and including digits in predetermined positions within the first identifier;
• query a database to identify account information of a user for processing the first event, the account information including an account number and the query using as input the key;
• identify the account information and process the first event based on the account information;
• generate a second identifier having the first number of digits, the second identifier including the key;
• and
• modify the device to include the second identifier and delete the first identifier.