Abstract: A device facilitating countersigning updates for multi-chip devices includes at least one processor configured to receive, from a collocated chip, a data item and a software update, the data item being signed using a private key corresponding to a primary entity associated with the collocated chip and the data item comprising an authentication code generated using a symmetric key corresponding to a secondary entity associated with the software update. At least one processor is further configured to verify the data item using a public key associated with the primary entity. At least one processor is further configured to verify the software update based at least in part on the authentication code and using the symmetric key corresponding to the primary entity. At least one processor is further configured to install the software update when both the data item and the software update are verified, otherwise discard the software update.

Abstract: Techniques are disclosed relating to authenticate a user with a mobile device. In one embodiment, a computing device includes a short-range radio and a secure element. The computing device reads, via the short-range radio, a portion of credential information stored in a circuit embedded in an identification document issued by an authority to a user for establishing an identity of the user. The computing device issues, to the authority, a request to store the credential information, the request specifying the portion of the credential information. In response to an approval of the request, the computing device stores the credential information in the secure element, the credential information being usable to establish the identity of the user. In some embodiments, the identification document is a passport that includes a radio-frequency identification (RFID) circuit storing the credential information, and the request specifies a passport number read from the RFID circuit.

Abstract: Techniques are disclosed relating to secure data storage. In various embodiments, a mobile device includes a wireless interface, a secure element, and a secure circuit. The secure element is configured to store confidential information associated with a plurality of users and to receive a request to communicate the confidential information associated with a particular one of the plurality of users. The secure element is further configured to communicate, via the wireless interface, the confidential information associated with the particular user in response to an authentication of the particular user. The secure circuit is configured to perform the authentication of the particular user. In some embodiments, the mobile device also includes a biosensor configured to collect biometric information from a user of the mobile device. In such an embodiment, the secure circuit is configured to store biometric information collected from the plurality of users by the biosensor.

Abstract: Systems, methods, and computer-readable media for preserving trust data during operating system updates of a secure element of an electronic device are provided.

Abstract: A device facilitating countersigning updates for multi-chip devices includes at least one processor configured to receive, from a collocated chip, a data item and a software update, the data item being signed using a private key corresponding to a primary entity associated with the collocated chip and the data item comprising an authentication code generated using a symmetric key corresponding to a secondary entity associated with the software update. At least one processor is further configured to verify the data item using a public key associated with the primary entity. At least one processor is further configured to verify the software update based at least in part on the authentication code and using the symmetric key corresponding to the primary entity. At least one processor is further configured to install the software update when both the data item and the software update are verified, otherwise discard the software update.

Abstract: A device implementing an express credential transaction system includes at least one processor configured to receive an indication that a payment applet for a service provider has been provisioned on a secure element of the device with a first attribute indicating that the payment applet can be utilized for a transaction without authentication associated with the transaction. The processor is configured to set the first attribute of the payment applet to indicate that authentication is required to utilize the payment applet when another payment applet for the service provider provisioned on the secure element of the device has an attribute that indicates the other payment applet can be utilized for the transaction without user authentication. The at least one processor is configured to control whether the user authentication is requested when utilizing the payment applet or the other payment applet, respectively, in transactions.

Abstract: This disclosure relates to adjusting a jitter buffer at a wireless device based on inter-arrival-jitter (IAJ). In one embodiment, an IAJ value may be calculated for each of multiple received packets. An IAJ distribution may be generated for the received packets. A target packet loss rate may be determined. A quality of service value for IAJ distributions corresponding to the target packet loss rate may be determined. A de-jitter delay value may be calculated based on the IAJ distribution and the quality of service value for IAJ distributions. The de-jitter delay value may be used to adjust the jitter buffer at the wireless device.

Abstract: Techniques are disclosed relating to authenticate a user with a mobile device. In one embodiment, a computing device includes a short-range radio and a secure element. The computing device reads, via the short-range radio, a portion of credential information stored in a circuit embedded in an identification document issued by an authority to a user for establishing an identity of the user. The computing device issues, to the authority, a request to store the credential information, the request specifying the portion of the credential information. In response to an approval of the request, the computing device stores the credential information in the secure element, the credential information being usable to establish the identity of the user. In some embodiments, the identification document is a passport that includes a radio-frequency identification (RFID) circuit storing the credential information, and the request specifies a passport number read from the RFID circuit.

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. Previously, the instantaneous jitter was derived from a weighted history of the media stream, and consequently only packets that had already been received were used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. Previously, the instantaneous jitter was derived from a weighted history of the media stream, and consequently only packets that had already been received were used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. In prior art designs, the instantaneous jitter is derived from a weighted history of the media stream, and consequently only packets that have already arrived are used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract: This disclosure relates to adjusting a jitter buffer at a wireless device based on inter-arrival-jitter (IAJ). In one embodiment, an IAJ value may be calculated for each of multiple received packets. An IAJ distribution may be generated for the received packets. A target packet loss rate may be determined. A quality of service value for IAJ distributions corresponding to the target packet loss rate may be determined. A de-jitter delay value may be calculated based on the IAJ distribution and the quality of service value for IAJ distributions. The de-jitter delay value may be used to adjust the jitter buffer at the wireless device.

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. In prior art designs, the instantaneous jitter is derived from a weighted history of the media stream, and consequently only packets that have already arrived are used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.