Abstract: Abstract based on the characteristics of Ad-hoc mobile network and detail analysis of the consistency condition in strand space model, a concept of five routing segments model was brought up and intermediator credibility condition was changed into the arbitrary intermediator credibility condition, thus the strand space model was adapted to the for Ad-hoc routing protocols. Then an attack was brought to verify the correctness and superiority of segments model.

Key words: Sstrand space model, Security protocol, Consistency condition, Arbitrary intermediator credibility condition