V-Tokens for Conditional Pseudonymity in VANETs

Date Added: Apr 2010
Format: PDF

Privacy is an important issue in future vehicle networks, because vehicles broadcast detailed information. Also of importance is accountability due to safety critical applications. Conditional pseudonymity, i.e., the usage of resolvable pseudonyms, is a common approach to address both. Often, resolvability of pseudonyms is achieved by authorities maintaining pseudonym-identity mappings. However, these mappings are privacy sensitive and require strong protection to prevent abuse or involuntary leakage. The authors present a new approach that does not rely on pseudonym-identity mappings to be stored by any party. Resolution information is directly embedded in pseudonyms and can only be accessed when multiple authorities cooperate for identity resolution.