From: Making a good thing better: enhancing password/PIN-based user authentication with smartwatch

Feature | Description |
---|---|

Mean Strength | Arithmetic mean of the signal strength |

Standard Deviation | Standard deviation of the signal strength |

Average Deviation | Average deviation from mean |

Skewness | Measure of asymmetry about mean |

Kurtosis | Measure of the flatness or spikiness of a distribution |

RMS | Square root of arithmetic mean of squares of the signal strength |