| 摘要 |
A method is provided of enabling respective users (A, B) of first and second devices ( 12, 2 ) of a trusted network to perform a secure transaction between them. A communications channel, such as a telephone conversation, is established between the users (A, B). A verification identifier for the transaction is communicated between the users (A, B) using the communications channel (A 6 ). The verification identifier is stored (A 3 ) at the first device ( 12 ) as a reference identifier for the transaction. A secure connection is opened between the two devices ( 12, 2 ) over the trusted network (A 10 ), the secure connection being different to the communications channel between the users (A, B). The verification identifier is sent (A 11 ) from the second device ( 2 ) to the first device ( 12 ) over the secure connection. The verification identifier received over the secure connection is compared (A 12 ) with the reference identifier at the first device ( 12 ). The secure transaction is performed over the secure connection (A 15 ) in dependence upon the comparison.
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