Validation method and system for use in securing nomadic electronic transactions
First Claim
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1. A method involving a communication device, the method implemented at a server communicatively coupled to the communication device by a network comprising:
- sending a request to the communication device from the server;
receiving at the server a response from the communication device over a local communication path;
deriving at the server a received data set from said response;
determining at the server at least one data set that had been previously transmitted to the communication device over a second communication path different from the local communication path; and
validating at the server the response based on the received data set and the at least one previously transmitted data set,wherein determining the at least one previously transmitted data set comprises determining at least one particular signature expected to be absent from the response if the response is valid, wherein validating the response comprises considering the response to be valid if the received data set does not match any of the at least one particular signature,wherein the response is a particular response and wherein each of the at least one particular signature is one of the at least one previously transmitted data set that has been included in a valid response already received from the communication device prior to receipt of the particular response,wherein validating the response further comprises considering the response to be invalid when the received data set matches one of the at least one particular signature.
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Abstract
A method involving a communication device, which comprises sending a request to a communication device; receiving a response from the communication device over a local communication path; deriving a received data set from said response; determining at least one data set that had been previously transmitted to the communication device over a wireless portion of a second communication path different from the local communication path; and validating the response based on the received data set and the at least one previously transmitted data set.
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14 Claims
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1. A method involving a communication device, the method implemented at a server communicatively coupled to the communication device by a network comprising:
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sending a request to the communication device from the server; receiving at the server a response from the communication device over a local communication path; deriving at the server a received data set from said response; determining at the server at least one data set that had been previously transmitted to the communication device over a second communication path different from the local communication path; and validating at the server the response based on the received data set and the at least one previously transmitted data set, wherein determining the at least one previously transmitted data set comprises determining at least one particular signature expected to be absent from the response if the response is valid, wherein validating the response comprises considering the response to be valid if the received data set does not match any of the at least one particular signature, wherein the response is a particular response and wherein each of the at least one particular signature is one of the at least one previously transmitted data set that has been included in a valid response already received from the communication device prior to receipt of the particular response, wherein validating the response further comprises considering the response to be invalid when the received data set matches one of the at least one particular signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification