Table 2.

ProVerif code for defining values and functions.

(*—-channels—-*)

free privateChannel:channel [private].

free publicChannel:channel [private].

(*—-constants—-*)

free ID:bitstring [private].

free N:bitstring [private].

(*—-shared key—-*)

free K:bitstring [private].

(*—-functions—-*)

fun xor(bitstring, bitstring):bitstring.

fun concat(bitstring, bitstring):bitstring.

fun h(bitstring):bitstring.

fun H(bitstring):bitstring.

equation forall a:bitstring, b:bitstring; xor(xor(a, b), b) = a.

(*—-events—-*)

event startfstS(bitstring).

event endfstS(bitstring).

event startfstN(bitstring).

event endfstN(bitstring).

event start2ndS(bitstring).

event end2ndS(bitstring).

event start2ndN(bitstring).

event end2ndN(bitstring).