Abstract: User authentication based on cognitive profiling. First, usage by a person of one or more computerized devices is automatically and continuously tracked. A cognitive profile of the person is automatically and continuously generated based on the tracked usage. Responsive to a request for authenticating an identity of the person, a cognitive question is automatically generated based on the cognitive profile, and is presented to a user professing to be the person. An answer to the cognitive question is received from the user. Finally, the identity of the person is automatically authenticated when the answer to the cognitive question is determined to be correct.

Abstract: Presented herein are devices, methods and software products for dynamically adjust a Transmitter Power Output (TPO) of a mobile wireless device's transmitter by computing a first geolocation of the mobile wireless device based on geolocation data received by the mobile wireless device, obtaining proximity attribute(s) of fixed location wireless access point(s) comprising at least a predefined second geolocation of the respective wireless access point, computing a minimal TPO value for the transmitter according to a distance between the first geolocation and the second geolocation of each wireless access point located within a transmission range of a transmitter of the mobile wireless device, selecting a preferred wireless access point requiring a lowest minimal TPO value and adjusting the TPO of the transmitter to the lowest minimal value. Wherein the minimal TPO value is sufficient for the respective wireless access point to reliably receive each message transmitted by the transmitter.

Abstract: User authentication based on cognitive profiling. First, usage by a person of one or more computerized devices is automatically and continuously tracked. A cognitive profile of the person is automatically and continuously generated based on the tracked usage. Responsive to a request for authenticating an identity of the person, a cognitive question is automatically generated based on the cognitive profile, and is presented to a user professing to be the person. An answer to the cognitive question is received from the user. Finally, the identity of the person is automatically authenticated when the answer to the cognitive question is determined to be correct.

Abstract: A computer program product, an apparatus and a method for training of an HMM. The method comprises applying a classifier that uses an HMM which was trained based on a training set, on a set of samples to provide an initial prediction; computing a first F1-score of the initial prediction measuring an accuracy of the initial prediction; selecting a misclassified sample by the classifier in the initial prediction; adding the misclassified sample to the training set; training the HMM using the misclassified sample to provide a modified HMM; applying the classifier using the modified HMM on the set of samples to provide a second prediction; computing a second F1-score of the second prediction; and comparing the first F1-score and the second F1-score; in response to a determination that the first F1-score is greater than the second F1-score, removing the misclassified sample from the training set.