  Vehicular ad-hoc networks (VANETs) have been proposed to automate
transportation industry in order to increase its accuracy, efficiency,
throughput, and specially safety. Security plays an Undeniable important role
on implementing VANETs in real life. Authentication is one of the basic
elements of VANETs security. Proposed authentications protocols suffer from
high overhead and cost. This paper presents a computation division based
authentication which divide signature approvals between neighbor vehicles
consequently decrease vehicles computation load. Simulation shows presented
protocol propose an almost constant latency and closely zero message loss ratio
related to traffic load, and improved efficiency compared with GSIS protocol.
