In some implementations, a system may receive a notification related to a battery life of a battery of a user device. The system may determine, based on the notification, a battery level of the battery of the user device. The system may select based on the battery level of the battery of the user device, a particular communication scheme, of a plurality of communication schemes, for communicating with a user of the user device. The system may transmit at least one message according to the particular communication scheme.

A method, system and device are disclosed. A premises device comprising a first operating system and a second operating system is described. The premises device comprises processing circuitry configured to establish a chain of trust at least between the first operating system and at least one software application associated with the second operating system. The processing circuitry is further configured to perform at least one action based at least in part on the established chain of trust.

A method, system and device are disclosed. A premises device comprising a first operating system and a second operating system is described. The premises device comprises processing circuitry configured to establish a chain of trust at least between the first operating system and at least one software application associated with the second operating system. The processing circuitry is further configured to perform at least one action based at least in part on the established chain of trust.

A CFI system constituted of: at least one protection module, each comprising a respective allowable flow model associated with at least one of a plurality of portions of a process; and at least one process protection manager, arranged, responsive to a control flow instruction in one of the plurality of portions of the process, to: compare one or more parameters of the control flow instruction to the allowable flow model of the associated protection module; and responsive to an outcome of the comparison indicating that the compared parameters do not meet a respective parameter of the allowable flow model, generate a predetermined signal, wherein each protection module is implemented as a shared object, wherein each process protection manager is implemented as a shared object, and wherein the at least one protection module and the process protection manager are loaded into the process.

A communications device for managing an authentication event is provided, which is configured to generate location data indicative of a geolocation associated with the communications device, retrieve, from a key that is obfuscated and stored in the communications device, the key, sign the location data with the retrieved key, and transmit request data to a communications server apparatus for requesting the authentication event, the request data comprising the signed location data. A method and a communications system for managing an authentication event are also provided.

A communications device for managing an authentication event is provided, which is configured to generate location data indicative of a geolocation associated with the communications device, retrieve, from a key that is obfuscated and stored in the communications device, the key, sign the location data with the retrieved key, and transmit request data to a communications server apparatus for requesting the authentication event, the request data comprising the signed location data. A method and a communications system for managing an authentication event are also provided.

A first device transmits a first message to a second device as part of a challenge-response protocol in order to authenticate the second device. A power limited power supply coupled to the second device limits power consumption by the second device during the second device's challenge-response protocol calculations. The first device measures a response time of the second device during the challenge-response protocol. The authentication of the second device is based on the response time of the second device while it has limited power consumption.

A first device transmits a first message to a second device as part of a challenge-response protocol in order to authenticate the second device. A power limited power supply coupled to the second device limits power consumption by the second device during the second device's challenge-response protocol calculations. The first device measures a response time of the second device during the challenge-response protocol. The authentication of the second device is based on the response time of the second device while it has limited power consumption.

A read-only memory (ROM) stores firmware code for a hardware component. A firmware controller is directly physically connected to the hardware component and to the ROM. The firmware controller exposes a virtual ROM link to the hardware component. The hardware component accesses the firmware code over the virtual ROM link exposed by the firmware controller.

In an example implementation according to aspects of the present disclosure, a system receives behavioral biometric data associated with a user of a computing device. The system determines whether an identity of the user is authenticated based on a comparison of the received behavior biometric data and historical behavioral biometric data associated with the user of the computing device. In response to determining that the identity of the user is not authenticated based on the comparison of the received behavioral biometric data and the historical behavioral biometric data, the system receives physiological biometric data associated with the user. The system determines whether the identity of the user is authenticated based on a comparison of the received physiological biometric data and historical physiological biometric data associated with the user of the computing device.