Abstract: A method for securing payment data for transmission over open communication networks is disclosed. The method comprises establishing a data connection between a first and a second transceiver device, the first transceiver device configured as a merchant device and the second transceiver device configured as a customer transceiver device. The merchant device transmits a first data package which comprises a unique merchant identifier and transaction request data, to the customer transceiver device over the data connection. The merchant device receives a cryptogram from the customer transceiver device. The cryptogram having been generated from using a secret key and a counter value together with the received unique merchant identifier and the transaction request data.

Abstract: A method for securing payment data for transmission over open communication networks is disclosed. The method comprises establishing a data connection between a first and a second transceiver device, the first transceiver device configured as a merchant device and the second transceiver device configured as a customer transceiver device. The merchant device transmits a first data package which comprises a unique merchant identifier and transaction request data, to the customer transceiver device over the data connection. The merchant device receives a cryptogram from the customer transceiver device. The cryptogram having been generated from using a secret key and a counter value together with the received unique merchant identifier and the transaction request data.

Abstract: A method is provided which comprises receiving at a server system associated with a card issuer or card program manager a transaction request for a transaction, the transaction request containing data to identify a customer account number; determining a mobile computing device associated with the customer account number; transmitting to the mobile computing device a payment request, the payment request comprising: (i) a requesting entity certificate signed with a private key of the card issuer or card program manager, and (ii) transaction data specifying the transaction and signed with the private key defined in (i); and receiving from the mobile computing device a payment authorisation message to authorise the transaction, the payment authorisation message comprising a cryptogram based on (i) data contained in the requesting entity certificate, (ii) data contained in a payment entity certificate, (iii) transaction data and (iv) mobile computing device data, where the cryptogram is signed with a cryptographic

Abstract: Some embodiments relate to a method comprising: a first mobile device detecting a radio signal and an associated authorization request packet from a second mobile device over a Bluetooth Low Energy interface, the authorization request packet including a first data attribute comprising a unique identifier of the second mobile device and a second data attribute comprising a first predetermined RSSI data value; determining a received signal strength indicator (RSSIm) of the detected radio signal; storing the RSSIm together with an associated time stamp in an historic data structure; calculating an average RSSI value, RSSIavg, by performing an averaging analysis on stored RSSIm values in the historical data structure that are associated with the first data attribute; and if RSSIavg meets or exceeds the first predetermined RSSI data value, preparing transaction data received from the second mobile device for display on an interface of the first mobile device.

Abstract: A method for securing payment data for transmission over open communication networks is disclosed. The method comprises establishing a data connection between a first and a second transceiver device, the first transceiver device configured as a merchant device and the second transceiver device configured as a customer transceiver device. The merchant device transmits a first data package which comprises a unique merchant identifier and transaction request data, to the customer transceiver device over the data connection. The merchant device receives a cryptogram from the customer transceiver device. The cryptogram having been generated from using a secret key and a counter value together with the received unique merchant identifier and the transaction request data.

Abstract: A method. The method comprises, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for the contactless transaction, receiving information associated with the card, and terminating communication with the card to authorizing the contactless transaction.