The security and privacy issues in vehicular ad hoc networks (VANETs) are often addressed with schemes based on either public key infrastructure, group signature, or identity. However, none of these schemes appropriately address the efficient verification of multiple VANET messages in high-density traffic areas. Attackers could obtain sensitive information kept in a tamper-proof device (TPD) by using a side-channel attack. In this paper, we propose an identity-based conditional privacy-preserving authentication scheme that supports a batch verification process for the simultaneous verification of multiple messages by each node. Furthermore, to thwart side-channel attacks, vehicle information in the TPD is periodically and frequently updated. Finally, since the proposed scheme does not utilize the bilinear pairing operation or the Map-To-Point hash function, its performance outperforms other schemes, making it viable for large-scale VANETs deployment.

中文翻译：

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一种有效的基于身份的条件隐私保护认证方案，用于车载自组织网络中的安全通信

车载自组织网络 (VANET) 中的安全和隐私问题通常通过基于公钥基础设施、组签名或身份的方案来解决。然而，这些方案都没有适当地解决高密度交通区域中多个 VANET 消息的有效验证。攻击者可以通过侧信道攻击获取保存在防篡改设备 (TPD) 中的敏感信息。在本文中，我们提出了一种基于身份的条件隐私保护认证方案，该方案支持批量验证过程，用于每个节点同时验证多条消息。此外，为了阻止侧信道攻击，TPD 中的车辆信息会定期更新。最后，