Distributed Aggregate Privacy-Preserving Authentication in VANETs
Existing secure and privacy-preserving vehicular communication protocols in vehicular ad hoc networks face the challenges of being fast and not depending on ideal tamper-proof devices (TPDs) embedded in vehicles. To address these challenges, we propose a vehicular authentication protocol referred to as distributedaggregate privacy-preserving authentication. The pro-posed protocol is based on our new multiple trusted authority one-time identity-based aggregate signature technique. With this technique a vehicle can verify many messages simultaneously and their signatures can be compressed into a single one that greatly reduces the storage space needed by a vehicle or a data collector (e.g., the traffic management authority). Instead of ideal TPDs, our protocol only requires realistic TPDs and hence is more practical.
- The existing protocol named APPA, is built on a one-time identity-based aggregate signature (OTIBAS) and the multiplicative secret sharing (MSS) technique, and, also requires the master secret (shares) of TA to be stored in a TPD.
- MSS is used to achieve leakage resiliency, i.e., the scheme remains secure in the presence of bounded information leakage of the master secret stored in the TPDs. Yet, a leakage-resilient scheme cannot withstand an obstinate attacker who continually places the TPD under a long-term side-channel attack.
- In fact, this attack strategy is attractive and practical for criminals, since, once the master secret is extracted, they can fully control the entire VANET.
DISADVANTAGES OF EXISTING SYSTEM:
- Suffer from time-consuming cryptographic operations.
- Huge volume of cryptographic data.
- Costly certificate/pseudonym management and/orreliance on ideal TPDs.
- We propose an efficient distributed aggregate privacy-preserving authentication (DAPPA) protocol for secure vehicular communications.The proposed protocol is based on our new multiple trusted authority one-time identity-based aggregate signature technique.
- An MTA-OTIBAS scheme consists of a root TA, several lower-level TAs and users. Each lower-level TA is enrolled by the root TA. A user can register to any lower-level TA and compute a signature on a message if the user has obtained a private key from the lower-level TA. The signature is only valid under the user’s identity and the public information of the lower-level TA.
- An MTA-OTIBAS scheme has the following features. Firstly, each user’s public key is his identity, which avoids certificate management. Secondly, a signer’s private key, associated with an identity and a lower-level TA, is restricted to be used only once and will be updated after each use. Thirdly, the MTA-OTIBAS scheme allows numerous signatures to be aggregated into a single one for fast verification and storage saving.
ADVANTAGES OF PROPOSED SYSTEM:
- Reduces the storage space needed by a vehicle or a data collector.
- With this technique a vehicle can verify many messages simultaneously.
- Our protocol only requires realistic TPDs.
- System : Pentium Dual Core.
- Hard Disk : 120 GB.
- Monitor : 15’’LED
- Input Devices : Keyboard, Mouse
- Ram :1GB
- Operating system : Windows XP/UBUNTU.
- Implementation : NS2
- NS2 Version : 2.28
- Front End : OTCL (Object Oriented Tool Command Language)
- Tool : Cygwin (To simulate in Windows OS)
Lei Zhang,Member, IEEE, Qianhong Wu, Member, IEEE, Josep Domingo-Ferrer,Fellow, IEEE,Bo Qin, and Chuanyan Hu “Distributed Aggregate Privacy-PreservingAuthentication in VANETs”.IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, 2017.