Abstract: A system and methods of computer security are provided wherein a first mobile computing device drives an acoustic transducer to emit an acoustic signal encoding a time-based, one time password (TOTP) code, and a second mobile computing device measures output of a MEMS gyroscope that senses the emitted acoustic signal. The second mobile computing device decodes the TOTP code from the gyroscope output, validates the TOTP code and responsively permits a user to access a secure application.

Abstract: A system is provided for detecting abnormal consumption in a distributed water infrastructure. The system may receive from at least one sensor associated with the distributed water infrastructure signals indicative of water usage in the distributed water infrastructure, and aggregate groups of signals to construct a plurality of time-based water event profiles, each water event profile containing a distribution of water usage indicators over time. The system may store a subset of the plurality of water event profiles in memory as normal water event profiles, and receive, from the at least one sensor, signals indicative of current water usage in the distributed water infrastructure. The system may construct, from the signals indicative of current water usage, at least one current water event profile, and compare the at least one current water event profile with normal water event profiles stored in the memory.

Abstract: A system and methods of computer security are provided wherein a first mobile computing device drives an acoustic transducer to emit an acoustic signal encoding a time-based, one time password (TOTP) code, and a second mobile computing device measures output of a MEMS gyroscope that senses the emitted acoustic signal. The second mobile computing device decodes the TOTP code from the gyroscope output, validates the TOTP code and responsively permits a user to access a secure application.

Abstract: The presently disclosed subject matter includes a sensor device, and a method of operating thereof. The sensor device comprises a processing unit being operatively connected to a sensor unit comprising a sensor characterized by adaptable sampling frequency. The sensor being configured to periodically sample, in a first sampling frequency, a physical quantity and generate a signal indicative of a detected physical quantity. The processing unit is configured to receive the signal and determine a detected frequency of the signal and to adapt the first sampling frequency to the detected frequency. The adapting comprising calculating a difference between the first sampling frequency and the detected frequency and instructing the sensor to increase the first frequency, if the difference is less than a first predefined value; and to decrease the first frequency, if the difference is less than a second predefined value.