Amazon put a quick stop to an issue in Alexa’s skill set after Checkmarx researchers reported that her skill set could be expanded to listen in on users not just some of the time but all of the time.
According to a Checkmarx research paper, Alexa skills can be developed in different languages using the Alexa skill set, which integrates with the AWS-Lambda function. The personal assistant device is always listening for the user’s voice so that when recognized, Alexa is activated.