Biblio

The key concerns in VANET communication are the security and privacy of the vehicles involved, but at the same time an efficient way to provide non-repudiation in the ad-hoc network is an important requirement. Most schemes proposed are using public key infrastructure (PKI) or symmetric key encryption to achieve security in VANET; both individually lack in serving the required purpose of providing privacy preservation of the involved On-Board Units (OBUs) (while still being able to offer non-repudiation) and amount to very sizeable overheads in computation. This paper proposes a privacy-preserving authentication protocol that employs hybrid cryptography, using the best features of PKI and symmetric cryptography to form a protocol that is scalable, efficient and offers services of integrity, non-repudiation, conditional privacy, and unlinkability; while still keeping the computational overhead at a reasonable level. The performance and security analysis of this scheme is provided to support the propositions.

Data security is a primary concern for every communication system. Communication becomes an essential tool for any business, education, defense services etc. It is essential to transfer data safe and secure. At present, various cryptography algorithms have been proposed and implemented. Those algorithms are classified into symmetric and asymmetric algorithms based on the number of keys used. Even though several algorithms are used for data security, they are compromise the security at the certain period. Now the idea is to combine the several secure algorithms to provide a highly secure environment for data transmission. The algorithms that are going to be combined are AES symmetric cryptographic algorithm, RSA asymmetric algorithm and MD5 hashing algorithm. With these three algorithms, we can ensure three cryptography primitives confidentiality, authentication and integrity of data.