# A survey on pseudonym changing strategies for Vehicular Ad-Hoc Networks

## TL;DR

This paper provides a comprehensive survey of pseudonym changing strategies in VANETs, analyzing their effectiveness in protecting location privacy amidst linking attacks and highlighting open research challenges.

## Contribution

It offers a detailed classification and comparison of existing pseudonym changing strategies, identifying gaps and future research directions in VANET privacy protection.

## Key findings

- Many strategies exist but none are fully effective against linking attacks.
- Current research highlights open issues and the need for more robust pseudonym changing methods.
- The survey identifies key criteria for evaluating pseudonym strategies.

## Abstract

The initial phase of the deployment of Vehicular Ad-Hoc Networks (VANETs) has begun and many research challenges still need to be addressed. Location privacy continues to be in the top of these challenges. Indeed, both of academia and industry agreed to apply the pseudonym changing approach as a solution to protect the location privacy of VANETs'users. However, due to the pseudonyms linking attack, a simple changing of pseudonym shown to be inefficient to provide the required protection. For this reason, many pseudonym changing strategies have been suggested to provide an effective pseudonym changing. Unfortunately, the development of an effective pseudonym changing strategy for VANETs is still an open issue. In this paper, we present a comprehensive survey and classification of pseudonym changing strategies. We then discuss and compare them with respect to some relevant criteria. Finally, we highlight some current researches, and open issues and give some future directions.