A computing device, comprising: one or more sensors (116, 118) configured to receive a first plurality of inputs associated with a user; and wherein the one or more sensors (116, 118) are further configured to determine whether the computing device is separated from the user; one or more processing components configured to: determine first input data based on at least the first plurality of inputs; and authenticate a user account associated with the user based on at least the first input data; wherein the one or more processing components are further configured to modify the authentication of the user account based on the determination of the separation; and a communication interface enabled to: communicate with one or more attachable devices carried by the user based on at least the authentication of the user account; and based on the communication with the one or more attachable devices, access second input data from at least a second plurality of inputs associated with the user; and wherein the one or more processing components are further configured to determine passive input data from the second input data, wherein the passive input data comprises movement data indicating natural movements of the user and size data indicating a size of a wrist or head of the user, and wherein the one or more processing components are configured to verify the authentication of the user account based on the passive input data. one or more sensors (116, 118) configured to receive a first plurality of inputs associated with a user; and wherein the one or more sensors (116, 118) are further configured to determine whether the computing device is separated from the user; one or more processing components configured to: determine first input data based on at least the first plurality of inputs; and authenticate a user account associated with the user based on at least the first input data; wherein the one or more processing components are further configured to modify the authentication of the user account based on the determination of the separation; and determine first input data based on at least the first plurality of inputs; and authenticate a user account associated with the user based on at least the first input data; wherein the one or more processing components are further configured to modify the authentication of the user account based on the determination of the separation; and a communication interface enabled to: communicate with one or more attachable devices carried by the user based on at least the authentication of the user account; and based on the communication with the one or more attachable devices, access second input data from at least a second plurality of inputs associated with the user; and wherein the one or more processing components are further configured to determine passive input data from the second input data, wherein the passive input data comprises movement data indicating natural movements of the user and size data indicating a size of a wrist or head of the user, and wherein the one or more processing components are configured to verify the authentication of the user account based on the passive input data. communicate with one or more attachable devices carried by the user based on at least the authentication of the user account; and based on the communication with the one or more attachable devices, access second input data from at least a second plurality of inputs associated with the user; and wherein the one or more processing components are further configured to determine passive input data from the second input data, wherein the passive input data comprises movement data indicating natural movements of the user and size data indicating a size of a wrist or head of the user, and wherein the one or more processing components are configured to verify the authentication of the user account based on the passive input data.