Authenticating the identity of examinees in online proctored examinations is a significant challenge, particularly when invigilators are unfamiliar with the students. The traditional method of identity verification, involving visual inspection of the examinee and their student identification card, is inadequate in the online environment. A speaker authentication system, designed for use in combination with the aforementioned visual checks in online proctored exams, was developed. The advanced speech recognition technologies incorporated result in accurate verification. The system offers a universal solution for exam invigilators, eliminating the need for prior acquaintance with the examinee, and its Graphical User Interface contributes to its user-friendliness for the proctor. It is also user-friendly for the examinee as it does not require them to have any additional hardware or install any additional software. The proposed robust and reliable speaker authentication system addresses the challenge of preventing contact cheating by way of impersonation in online proctored examinations.