| 摘要 |
Methods are detailed for online fraud prevention. In one approach state information of a first and a second device is monitored, both of which are associated with one user. During a multi-factor authentication procedure which utilizes at least one of the first and the second devices for authorizing a transaction by an Internet domain, a security server participates in a supplemental security procedure which is conditional on the monitored state information. In another approach the second device receives a message that is ostensibly related to multi-factor authentication by an Internet domain, and in response sends a query about state information of the first device. Based on the response to the query that indicates the state information, the second device performs a supplemental security procedure. |
