Research on Lightweight Mutual Authentication for the Product Authorization Chain

Table 1

Notations.

Symbols	Meaning
	level agent user
	Unique identity of
	Login password of
	The login password to update for
	Server
	The values of four security parameters index
	Secret key and number of
	Unique random number for distributed by
	saving the last send packet sequence number in login phase
	saving the last send packet sequence number in authentication phase
	saving the last send packet sequence number in authentication phase
	Strong one-way hash function