【摘要】 由于价格等因素,国内部分城市地铁自动售票系统选用Mifare Ultralight卡作为单程车票票卡。Ultralight为存储卡,无安全机制,存在容易伪造的隐患。结合实际工作提出了一种单程票安全保障机制,并给出了实现方法。该方法基于PKI(公共密钥基础设施)专用装置实现交易密钥的传输、保存和交易密钥计算,能够有效地防止密钥被破译,且交易密钥能实现安全迅速地更换。更多还原

【Abstract】 As a result of the price factor,some domestic subway AFC(Automatic Fare Collection) systems select Mifare Ultralight cards as single journey tickets in China. Ultralight is a memory card and has no safety mechanism,and thus is easy to be counterfeited.In this article,an authentication method of single journey ticket for Ultralight cards was presented.This method can prevent explaining the key and rapidly replace the transaction key safely through a special purpose installment based on PKI(Public Key Infrastructure),which is used for transaction key transmission,saving,and computation.更多还原