In some implementations, a disclosed method may include receiving, from a wearable, data representative of a gesture executed by a wearer of the wearable, and recognizing, based on the data representative of the gesture, the gesture executed by the wearer. The disclosed method may also include identifying, based on the data representative of the gesture, the wearer via a machine learning model trained to identify biomechanical characteristics of wearers based on gesture data. The disclosed method may also include executing, based on the gesture executed by the wearer and identifying of the wearer, a security action directed to a secured device. Various other systems, methods, and computer-readable media are also disclosed.