【摘要】 重加密技术是解决RFID(射频识别)安全问题的一种方法,它周期性地改变标签名以防止标签跟踪。重加密要求标签名可修改,这就使得攻击者可以交换两个合法标签的标签名,形成置换攻击。防置换攻击仍然是重加密中未完全解决的问题,其难点在于防置换攻击时需保持标签匿名性。提出了一种重加密中的防置换攻击算法,在“攻击失效”模型下,实现了防ID置换攻击和公钥置换攻击,并给出了证明。该算法要求标签内增加一个硬件乘法器,目前的RFID芯片水平可实现该要求。更多还原

【Abstract】 Re-encryption is an approach for RFID security,which periodically renames the tags in order to avoid tag tracking.Re-encryption demands that the name of tag is rewriteable,so the adversary can swap two valid names of tags,forming swapping attack.Defending swapping attack is still an un-solved problem in re-encryption with the difficulty of keeping anonymity and anti-swapping simultaneously.The paper promotes a swapping defending algorithm in re-encryption under the “attack-invalid” model,and realizes the ID anti-swapping and public-key anti-swapping,and gives proof.The tag requires a hardware multiplier,and it’s applicable with the current RFID chip technology.更多还原