Systems and methods of securing vehicle services from denial-of-service attacks using dynamic signature

A computer-implemented method, the method comprising:

• receiving, via one or more processors, a first plurality of sessions and a second plurality of sessions associated with a communication between a client and an in-vehicle application service, wherein the first plurality of sessions are authenticated sessions with a first quality of service (QOS) processing priority;
• assigning, via the one or more processors, each of the received second plurality of sessions with a second QoS processing priority that is lower than the first QoS processing priority;
• collecting, via the one or more processors, a flow signature of each of the first plurality of sessions and each of the second plurality of sessions associated with the communication between the client and the in-vehicle application service;
• generating, via the one or more processors, an expected runtime flow signature based on the collected flow signature of each of the first plurality of sessions associated with the communication between the client and the in-vehicle application service;
• comparing, via the one or more processors, the flow signature of each of the second plurality of sessions with the expected runtime flow signature based on a time at which each of the second plurality of sessions were received;
• promoting, via the one or more processors, the second QoS processing priority of a group of the second plurality of sessions to the first QoS processing priority;
• and
• dropping, via the one or more processors, the second plurality of sessions with the second QoS processing priority.