Table 2 Variables and functions
From: A secure and privacy-preserving authentication protocol for wireless sensor networks in smart city
free ch1:channel. free ch2:channel. free ch3:channel. type user. type sensor. type GWN. free ui:user. free sj:sensor. free gwn:GWN. free UIDi:bitstring. free UPWDi:bitstring. free BIOi:bitstring. free Sg:bitstring[private]. free PKg:bitstring. free GWNPSj:bitstring[private]. free SIDj:bitstring. free SKus:bitstring[private]. free SKsu:bitstring[private]. (*fun hash*) fun hash(bitstring):bitstring. (*encrpt and dencrpt*) fun E(bitstring,bitstring):bitstring. fun D(bitstring,bitstring):bitstring. (*BioHash*) fun gen(bitstring):bitstring. fun Rep(bitstring,bitstring):bitstring. (*XOR operation*) fun XOR(bitstring,bitstring):bitstring. equation forall m:bitstring,n:bitstring;XOR(XOR(m,n),n)=m. (*Diffie-Hellman fun*) fun G(bitstring):bitstring. fun GK(bitstring,bitstring):bitstring. (*concatenation operation*) fun concat(bitstring,bitstring):bitstring. | Â |