A RFID Authentication Protocol for Epidemic Prevention and Epidemic Emergency Management Systems

Table 2

Symbols and definitions of the RAPUS protocol.

Symbols	Definitions
T; S; R	RFID tag; database (DB); reader device
IDTi; AIDTi; SID; Rj; Nt; Nr	i^th tag identity; one-time tag alias identity; shadow identity
Kts; Kemg	j^th reader identity; Tag random number; reader random number
Trseq; Krs	Shared key (shared emergency key) of server and tag
rj	Track sequence number (used by both S and T)
h(.); ⊕; ||	Hash function; the exclusive XOR operation; concatenation