Steering control system and method for performing reprogramming

A reprogramming method performed in a Steer by Wire (SbW) steering control system comprising an input-side steering control device comprising a first input-side control module and a second input-side control module configured to control an input-side steering motor connected to a steering wheel, the method comprising:

• receiving, by the first input-side control module, a first signed firmware from a communication device in a normal state, and performing reprogramming by applying a first valid firmware obtained through an integrity verification procedure;
• and
• receiving, by the second input-side control module, a second signed firmware from the communication device in a normal state, and performing reprogramming by applying a second valid firmware obtained through the integrity verification procedure,
• wherein the method further comprises, when the second signed firmware is not received by the second input-side control module from the communication device, receiving, by the first input-side control module, a third signed firmware, in which a first firmware and the second signed firmware are integrated, from the communication device, performing the integrity verification procedure on the third signed firmware to obtain the second signed firmware, and transmitting the second signed firmware to the second input-side control module.