| 摘要 |
A fraud-prevention system having user security parameters based on user instruction. A user specifies the security parameter for a transaction. The security parameter may include, but is not limited to a geographic location, a monetary value range, a transaction mode, an account access parameter, a class of goods, or a class of services. The fraud-prevention system acquires this security parameter information from the user and stores it in a user security parameter database. The fraud-prevention system uses these user security parameters to screen subsequent transactions. |
