Apparatus and method for irrepudiable token exchange

A mobile client apparatus, operable in communication with a server apparatus having a transaction recorder component operable to create and maintain a secure record of the occurrence of a transactional exchange meeting with a holder of a second mobile client apparatus, and comprising:

• a requester/responder component operable in communication with the server apparatus for setting up a meeting arrangement mediated by the server apparatus;
• a token receiver component operable to receive a first token from the server apparatus;
• a token sender component operable to send at least a portion of the first token to the second mobile client apparatus;
• a validation receiver component operable to receive a validation signal from the server apparatus;
• and
• a completion signaler responsive to the receipt of the validation signal by the validation receiver component and operable to send a completion signal to the server apparatus,
• wherein the token receiver component is further operable to receive at least a portion of a second token from the second mobile client apparatus,
• and wherein the token sender component operable to send the at least a portion of the second token to the server apparatus.

A method for controlling a server apparatus, operable in communication with a plurality of mobile client apparatuses for securely recording the occurrence of a transactional exchange meeting between holders of the mobile client apparatuses, and comprising:

• responsive to a request and a response from the plurality of mobile client apparatuses, setting up a meeting arrangement mediated by the server and communicating a first issued token to a first mobile client apparatus of the plurality of mobile client apparatuses and a second issued token to a second mobile client apparatus of the plurality of mobile client apparatuses;
• receiving at least a portion of each of the plurality of tokens from the plurality of mobile client apparatuses responsive to a meeting occurrence, validating that the at least a portion of the token received from the first mobile client apparatus matches at least a portion of the second issued token and that the at least a portion of the token received from the second mobile client apparatus matches at least a portion of the first issued token, and signaling the validation of the plurality of tokens to each of the holders of the mobile client apparatuses;
• and
• creating and maintaining a secure record of at least the request, the response, the validation of the plurality of tokens, and a completion signal from each of the plurality of mobile client apparatuses.

A method of controlling a mobile client apparatus, operable in communication with a server apparatus having a transaction recorder component operable to create and maintain a secure record of the occurrence of a transactional exchange meeting with a holder of a second mobile client apparatus, and comprising:

• communicating with the server apparatus, by a requester/responder component, to set up a meeting arrangement mediated by the server apparatus;
• receiving a first token from the server apparatus;
• sending at least a portion of the first token to the second mobile client apparatus;
• receiving at least a portion of a second token from the second mobile client apparatus;
• sending the at least a portion of the second token to the server apparatus;
• receiving a validation signal from the server apparatus;
• and
• responsive to the receipt of the validation signal by the validation receiver component, sending a completion signal to the server apparatus.