Abstract: A personal security system that continually monitors audio from any microphone accessible from a computer or mobile phone for keys, identifies keys emitted by a user and if found, issues an alert. May also monitor movement to aid in event detection. Audio monitoring may search for keys in a personalized manner to minimize false positives and may work on low power devices in the background to continually provide security, even if a computer is locked. May transmit alerts via a data network, or voice network. The alerts may be sent to users, devices, security or medical entities to provide personal safety and security. May also be utilized for persons unable to physically manipulate their phone or computer, during or after an assault, or medical emergency. May also be utilized to improve safety when moving between locations, to improve the safety of a driver or a passenger of a vehicle.