中文摘要：

提出了一种RSU协助的分布式假名生成方法。首先，车辆用户生成自己的临时公钥，当经过RSU时，由RSU对其临时公钥进行盲签名；然后，车辆得到RSU对自己临时公钥的签名，并将该签名与临时公钥一起构成车辆的一个假名（临时公钥＋RSU对临时公钥的签名），通过该假名与周围节点进行通信。本方法的优势在于：一方面RSU能够分担VANET中认证中心（CA）的负担，有效地提高了系统的效率、增强了系统的可扩展性；另一方面，由于生成车辆假名的私钥在RSU中，而不是在车辆中，因此增加了攻击者提取系统密钥的难度，从而提高了系统的安全性。

英文摘要：

A RSU-aided distributed method for pseudonym generation was put forward. Firstly, vehicle users generated their own temporary public keys. When a vehicle passed through RSU, its temporary public key was blindly signed by RSU. After the vehicle obtained a signature for its temporary public key, it combined the temporary public key and the signature together to make up a vehicle pseudonym （temporary public key and its signature by RSU）. A vehicle commu- nicated with the surrounding nodes through pseudonym. The advantage of this method is that RSU could share some workload of certificate authority （CA） in VANET. It improves system efficiency and strengthens its scalabitity. Mean- while, since the private key which generates vehicle＇s pseudonym is in the RSU, but not in the vehicle. It is more difficult for adversary to extract private key from system. As a result, the security of system is enhanced.