Systems and methods are provided for authenticating a user for access to a conference session by validating the user's location. The systems and methods may include receiving an image captured with an image-capturing device. The image may be of an object visible to a user from an authorized conference-session location. The image may be associated with the authorized conference-session location. The systems and methods may further include receiving location information indicating the authorized conference-session location, generating challenge questions based on the image, and designating one or more challenge questions for display to the user. The systems and methods may further include receiving a response to the designated challenge questions, validating the user's location based on the response, authenticating the user for access to a conference session based on the response, and granting the user access to the conference session based on the authentication.