[Retracted] Merging RFID and Blockchain Technologies to Accelerate Big Data Medical Research Based on Physiological Signals

Table 2

Symbols and definitions of the enhanced RFID system privacy protection authentication protocol.

Symbols	Definitions
Ci; ; COUNT	Challenge from the DB to reader; temporary identity; count
Ri; ; Ns	Response for the reader; Ri ⊕ Ns; random number generated
Ress; CRP ( ); Ki	); i^th challenge-response; i^th key
PUFT;h (.);  ⊕;	PUF for the tag T; one-way hash function; XOR; concatenation
KH; KP; KD	Hospital; patient; doctor