Fully Integrated Passive UHF RFID Tag for Hash-Based Mutual Authentication Protocol

Table 3

Time evaluation of OMHSO protocol using SPONGENT-160 or Keccak on the tag. The results using SPONGENT-160 are already mentioned in [10].

Step	Process	Time; (ms)	Time; (ms)	Difference of time; (ms)
	Hash function	SPONGENT-160	Keccak	—
()	Load tag state and seed for PRNG from EEPROM to SRAM	0.02	0.02	0
()	Load key from EEPROM to SRAM	0.02	0.02	0
()	Calculate and with hash function	4.52	0.23	4.29
()	Calculate with hash function	2.94	0.14	2.8
()	Compare with	0.06	0.06	0
()	Calculate new key with hash function	2.04	0.11	1.9
()	EEPROM block write for new key	4.33	4.33	0
()	EEPROM block write for new seed	4.33	4.33	0
	Total	18.26	9.24	9.02