A contactless card can include a plurality of keys for a specific operation, e.g., encryption or signing a communication. The contactless card can also include an applet which uses a key selection module. The key selection module can select one of the plurality of keys and the applet can use the key to, e.g., encrypt or sign a communication using an encryption or signature algorithm. The contactless card can send the encrypted or signed communication to a host computer through a client device. The host computer can repeat the key selection technique of the contactless device to select the same key and thereby decrypt or verify the communication.

Various embodiments are generally directed to improving card security by providing a user a contactless card with no sensitive card information, such as card number, card verification value, and expiration date, printed thereon, and displaying the sensitive card information relative to the card in augmented reality (AR) based on successful NFC-based user authentication. According to examples, the NFC-based user authentication may be performed by one-tapping or single tapping the contactless card to user mobile device. One or more portions of the sensitive card information may be obfuscated to further enhance card security. Moreover, the user can interact with AR elements including the sensitive card information to perform various actions.

Embodiments are generally directed to systems, devices, and techniques to authenticate unauthenticated users to perform sensitive actions.

A device may receive a uniform resource locator (URL) and encrypted data. The device may download a first application from an application server based on the URL. The device may download and execute the first application. The first application may receive the encrypted data.

An electronic device is provided, which includes a wireless communication module; at least one processor; and a memory configured to store instructions that, when executed by the at least one processor, cause the electronic device to perform a transaction with an external device using the wireless communication module, receive, from a payment server, payment approval information indicating that the transaction is approved, the payment approval information including device information of an access point (AP) located in an offline merchant and period information, establish, in response to receiving the payment approval information, a connection with the AP using the wireless communication module based on the device information of the AP, after the connection with the AP is established, operate a timer corresponding to the period information, and terminate the connection to the AP when the timer expires.

An electronic device is provided, which includes a wireless communication module; at least one processor; and a memory configured to store instructions that, when executed by the at least one processor, cause the electronic device to perform a transaction with an external device using the wireless communication module, receive, from a payment server, payment approval information indicating that the transaction is approved, the payment approval information including device information of an access point (AP) located in an offline merchant and period information, establish, in response to receiving the payment approval information, a connection with the AP using the wireless communication module based on the device information of the AP, after the connection with the AP is established, operate a timer corresponding to the period information, and terminate the connection to the AP when the timer expires.

A transportation vehicle having a BLUETOOTH® Low Energy (BLE) system to send and receive BLE advertising signals, BLE connection request signals and BLE data signals via at least one antenna, a central locking system to lock or unlock at least one vehicle door of the transportation vehicle, and a control unit to activate the BLE system and to activate the central locking system based on the BLE data signals. Also disclosed is an electronic vehicle radio key and a system for passive access to a transportation vehicle including a transportation vehicle, an electronic vehicle radio key and a smartphone. The system allows a user passive access to the transportation vehicle, both with the aid of the electronic vehicle radio key and with the aid of the smartphone.

A system and a method for a supply-chain hardware integrity for electronics defense (SHIELD) dielet embedded over a component of a device, a radio frequency identification (RFID) probe system coupled to the SHIELD dielet, and a secure server system communicating with the RFID probe system that can enable security services is provided. Embodiments include a multi-function SHIELD software defined, hardware enabled security system that provides hardware identity, anti-tamper, encryption key generation and management, trusted platform module services, and cryptographic software security services for a device.

A system and a method for a supply-chain hardware integrity for electronics defense (SHIELD) dielet embedded over a component of a device, a radio frequency identification (RFID) probe system coupled to the SHIELD dielet, and a secure server system communicating with the RFID probe system that can enable security services is provided. Embodiments include a multi-function SHIELD software defined, hardware enabled security system that provides hardware identity, anti-tamper, encryption key generation and management, trusted platform module services, and cryptographic software security services for a device.

A number of techniques are disclosed for making it more convenient and efficient for customers to conduct various rental vehicle transactions. As an example, a technique for performing an automated pickup of a rental vehicle using a mobile device is disclosed. As another example, a technique for performing an automated return administration of a rental vehicle using a mobile device is disclosed. As another example, a technique for permitting customer to select a particular rental vehicle for a rental vehicle transaction using a mobile device is disclosed. Also disclosed is a technique for permitting a customer to keylessly start a rental vehicle using a machine-sensible item such as his/her mobile device without requiring the customer to possess a smart key.