An authentication system comprising: a wearable apparatus, wherein the wearable apparatus is a garment; a wearable computing means incorporated into the wearable apparatus, wherein the wearable computing means comprises a microprocessor and wireless communication means for communicating with a remote terminal; and a plurality of wearable biometric sensing devices (105, 106) incorporated into the wearable apparatus and adapted to communicate with the wearable computing means, wherein the plurality of wearable biometric sensing devices (105, 106) are electrodes adapted to measure a user's Electrocardiogram, ECG, and Electrodermal Activity, EDA, wherein the plurality of wearable biometric sensing devices (105, 106) are ECG electrodes and EDA electrodes, wherein the ECG electrodes and the EDA electrodes are the same electrodes, wherein the plurality of wearable biometric sensing devices (105, 106) are incorporated in or on clothing in a manner in contact with skin, wherein the wearable computing means is adapted to determine user authentication by comparing the user's ECG with a template, wherein the wearable computing means is adapted to determine user physiological state by comparing the user's EDA with a threshold or profile based on measurements from one or more of the plurality of wearable biometric sensing devices (105, 106), wherein the wearable computing means is further adapted to utilize the determined physiological state and the user authentication to determine if the user should be authenticated when in a determined physiological state, wherein the wearable computing means is further adapted to activate a trigger when a user is authenticated but the determined user physiological state is outside a predetermined range, and wherein the trigger activates at least one of an alarm, a camera, or initiating a communication to a remote service, wherein the wearable computing means further comprises a motion sensor and wherein the trigger is suppressed when the determined user physiological state is outside a predetermined range and the motion sensor detects a certain level of user motion. a wearable apparatus, wherein the wearable apparatus is a garment; a wearable computing means incorporated into the wearable apparatus, wherein the wearable computing means comprises a microprocessor and wireless communication means for communicating with a remote terminal; and a plurality of wearable biometric sensing devices (105, 106) incorporated into the wearable apparatus and adapted to communicate with the wearable computing means, wherein the plurality of wearable biometric sensing devices (105, 106) are electrodes adapted to measure a user's Electrocardiogram, ECG, and Electrodermal Activity, EDA, wherein the plurality of wearable biometric sensing devices (105, 106) are ECG electrodes and EDA electrodes, wherein the ECG electrodes and the EDA electrodes are the same electrodes, wherein the plurality of wearable biometric sensing devices (105, 106) are incorporated in or on clothing in a manner in contact with skin, wherein the wearable computing means is adapted to determine user authentication by comparing the user's ECG with a template, wherein the wearable computing means is adapted to determine user physiological state by comparing the user's EDA with a threshold or profile based on measurements from one or more of the plurality of wearable biometric sensing devices (105, 106), wherein the wearable computing means is further adapted to utilize the determined physiological state and the user authentication to determine if the user should be authenticated when in a determined physiological state, wherein the wearable computing means is further adapted to activate a trigger when a user is authenticated but the determined user physiological state is outside a predetermined range, and wherein the trigger activates at least one of an alarm, a camera, or initiating a communication to a remote service, wherein the wearable computing means further comprises a motion sensor and wherein the trigger is suppressed when the determined user physiological state is outside a predetermined range and the motion sensor detects a certain level of user motion.