Efficient and Secure Biometric-Based User Authenticated Key Agreement Scheme with Anonymity

Box 3

Role specification in HLPSL for the session, environment, and goal.

role session(Ui, Sj: agent,

SKuisj  : symmetric_key,

H  : hash_func)

def=

local SI, SJ, RI, RJ: channel (dy)

composition

user(Ui, Sj, SKuisj, H, SI, RI)

server(Ui, Sj, SKuisj, H, SJ, RJ)

end role

goal

secrecy_of subs1

secrecy_of subs2

authentication_on user_server_r1

authentication_on server_user_r2

end goal

environment()

role environment()

def=

const ui, sj: agent,

skuisj  : symmetric_key,

h  : hash_func,

%H  : one-way/bio hash function

idi, pwi, bioi, x, r1, r2: text,

user_server_r1, server_user_r2, subs1, subs2  :

protocol_id

intruder_knowledge =

composition

session(ui, sj, skuisj, h)

session(ui, sj, skuisj, h)

end role