Using IBC and Chameleon Hash for the Confidentiality and Message Authentication in VANET

The transport information security provided by vehicles under VANET environment is quite important. The advantages of the method proposed in the essay are as follows: 1. Communication equipments could validate the information mutually through IBC; 2. Vehicles could validate the legality of public/private key. 3. Vehicles need not show any certificates to validate the identity, so as to avoid the certificates from attacking owing to long-term exposure; 4. The vehicle information could be validated through chameleon method, without waiting for RSU to validate the information, which could improve the instantaneity of the information; 5. The vehicles need not revalidate the identities and consult common key during the time of Hand-off within different RSU ranges.