1. A computing device, comprising: a processor; and memory storing instructions that, when executed by the processor, cause the computing device to: receive identifying information for a user in association with accessing information for products offered through an electronic marketplace; receive a request to complete a transaction with the electronic marketplace on behalf of the user; capture a first image using a camera of the computing device, the camera configured to capture at least a portion of a person interacting with a display screen of the computing device; cause the first image to be analyzed to attempt to recognize an identity of the person contained in the first image; cause additional captured image information to be analyzed to verify whether the person contained in the first image corresponds to a physical being in proximity of the computing device; authenticate the user as a result of the identity of the person being recognized as the user associated with the identifying information and as a result of the person being verified to correspond to a physical being; and cause the transaction to be completed once the user is authenticated.