A Systematic Approach for Cybersecurity Design of In-Vehicle Network Systems with Trade-Off Considerations

Table 5

Identified system parameters.

Group	Notation	Description
Communication	TConnEst	Equals tb − ta, time for the connection establishment
	TUpdate	Equals td − tc, time for the update, which is from the first request message to the last response message according to the firmware update protocol
Security	NAttackPoint	Number of attack points
	SAttack	Severity of attacks
	PAttack	Probability of attacks
Safety	—	Since this is a nonsafety-critical system, no safety-related parameter is identified