Abstract: A method of establishing secure communication between a first mobile computing device and a second mobile computing device includes generating a first self-signed key at the first mobile computing device, pairing the first device with a second device, the pairing including receiving user input of a passcode and after receiving the user input sending the first public key to the second mobile computing device and receiving a second public key from the second mobile computing device, storing the second public key in a database of trusted devices, the database of trusted devices being stored in the first mobile computing device, receiving in the first mobile computing device a list of mobile computing devices connected to a mobile network, matching the list of mobile computing device against the database of trusted devices, and establishing secure communication between the first mobile computing device and the second mobile computing device.

Abstract: A method of establishing secure communication between a first mobile computing device and a second mobile computing device includes receiving a first request from the first mobile computing device to securely communicate with the second mobile computing device via a Wi Fi hot spot, verifying that the first mobile computing device is trusted, generating a public key and a private key based on a trusted certificate, sending the private key to the first mobile computing device via the Wi-Fi hot spot, receiving a second request from the second mobile computing device to securely communicate with the first mobile computing device, verifying that the second mobile computing device is trusted, and sending the public key to the second mobile computing device.

Abstract: A method of establishing secure communication between a first mobile computing device and a second mobile computing device includes receiving a first request from the first mobile computing device to securely communicate with the second mobile computing device via a Wi Fi hot spot, verifying that the first mobile computing device is trusted, generating a public key and a private key based on a trusted certificate, sending the private key to the first mobile computing device via the Wi-Fi hot spot, receiving a second request from the second mobile computing device to securely communicate with the first mobile computing device, verifying that the second mobile computing device is trusted, and sending the public key to the second mobile computing device.

Abstract: A method of establishing secure communication between a first mobile computing device and a second mobile computing device includes generating a first self-signed key at the first mobile computing device, pairing the first device with a second device, the pairing including receiving user input of a passcode and after receiving the user input sending the first public key to the second mobile computing device and receiving a second public key from the second mobile computing device, storing the second public key in a database of trusted devices, the database of trusted devices being stored in the first mobile computing device, receiving in the first mobile computing device a list of mobile computing devices connected to a mobile network, matching the list of mobile computing device against the database of trusted devices, and establishing secure communication between the first mobile computing device and the second mobile computing device.

Abstract: A method of establishing secure communication between a first mobile computing device and a second mobile computing device includes receiving a first request from the first mobile computing device to securely communicate with the second mobile computing device via a Wi Fi hot spot, verifying that the first mobile computing device is trusted, generating a public key and a private key based on a trusted certificate, sending the private key to the first mobile computing device via the Wi-Fi hot spot, receiving a second request from the second mobile computing device to securely communicate with the first mobile computing device, verifying that the second mobile computing device is trusted, and sending the public key to the second mobile computing device.

Abstract: A method of reconstructing a packet that includes financial card information from a mobile device uses a card reader. The card reader has a read head, a slot for swiping a magnetic stripe of a card and device electronics that includes a microcontroller with logic resources with code. The card reader has a unique identifier and associated cryptographic key. The same code is used to produce an encrypted and signed signal. The encrypted and signed signal, that includes the card reader identifier, is sent to the mobile device. The mobile device sends an encrypted and signed packet to a back end of a payment system. A cryptographic key is sued to decrypt and verify the contents of the packet at the back end. Non-encrypted financial card information is sent to a payment gateway.