| 摘要 |
Systems and methods for generating a dynamic verification value for electronic payment transactions are disclosed. The dynamic verification value is generated via a function-based algorithm that accepts a plurality of security values as input. By selecting a set of security values from the plurality of the available security values, the level of complexity and security of the dynamic verification value can be adjusted and a unique security characteristic for the dynamic verification value is obtained. Also, the issuers of portable consumer devices are able to regenerate the dynamic verification value by inputting an issuer secret phrase into the same type of function-based algorithm that was used originally to generate the dynamic verification value. |
