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    • 16. 发明申请
    • ACCOUNT TRANSACTION FRAUD DETECTION
    • 帐户交易欺诈检测
    • US20090063354A1
    • 2009-03-05
    • US12202978
    • 2008-09-02
    • John Foxe SheetsKim Wagner
    • John Foxe SheetsKim Wagner
    • G06Q20/00H04L9/32
    • G06Q20/4016G06Q20/04G06Q20/401G06Q20/403G06Q2220/00
    • A merchant conducting a transaction on an account forms transaction data with a sensitive data field. To obscure the account prior to transmitting information about the transaction, for each character in the sensitive data field, a combined character is formed with a character of a generated pad. A replacement character is formed by a modulus operation on the combined character and is stored in the corresponding position in the sensitive data field. A transmission containing the sensitive data field with replacement characters is delivered to the merchant's acquirer. Subsequently, a first transmission is received for another transaction from a merchant that contains transaction data upon an account and a sensitive data field. Using the sensitive data field, an attempt is made to retrieve a transaction data record that contains data from a previous transaction that includes the account upon which the previous transaction was conducted. The sensitive data field, which is encrypted as the corresponding account upon which the previous transaction was conducted, was encrypted by a character-by-character modulo operation using a generated pad. If the transaction data record is retrieved, a second transmission is sent that contains a fraud notification of the attempt to conduct a transaction upon the encrypted account in the sensitive data field. If there is no retrieval of the transaction data record, a third transmission containing a no-fraud notification is sent.
    • 在帐户上进行交易的商户用敏感数据字段形成交易数据。 为了在发送关于事务的信息之前遮蔽该帐户,对于敏感数据字段中的每个字符,组合字符形成有生成的字符的字符。 通过对组合字符的模数运算形成替换字符,并将其存储在敏感数据字段中的相应位置。 包含具有替换字符的敏感数据字段的传输被传递给商家的收单。 随后,从包含帐户和敏感数据字段的交易数据的商家接收另一交易的第一传输。 使用敏感数据字段,尝试检索包含来自先前交易的数据的交易数据记录,其中包括进行上一个交易的账户。 作为进行先前交易的相应帐户被加密的敏感数据字段通过使用生成的按键的逐个字符的模数运算被加密。 如果检索到交易数据记录,则发送第二个发送,其中包含在敏感数据字段中在加密帐户上进行交易的尝试的欺诈通知。 如果没有交易数据记录的检索,则发送包含无欺诈通知的第三传输。