A method for conducting a secured computer based assessment using a candidate assessment device, the method comprising: receiving registration data of a candidate at a central assessment server from the candidate assessment device present in an examination center before beginning of an examination, wherein the registration data comprises biometric data, a still image and a surround sound associated with the candidate; performing one of the registration and validation of identity of the candidate by comparing the registration data with the data previously stored in the central assessment server, wherein the previously stored data is a data stored by an exam conducting body in the central assessment server prior to the beginning of the examination; communicating a test question data from the central server to the candidate assessment device for initiating the examination, in response to the validation of the identity of the candidate; receiving proctoring data captured by the candidate assessment device of the candidate via a master control device at the central assessment server at predefined time intervals during the examination, wherein the proctoring data comprises biometric data, a still image, and a surround sound associated with the candidate, and wherein the candidate assessment device is a handheld device, and wherein the candidate assessment device is equipped with in-built security sensor for capturing the biometric data, an in-built camera for capturing the still image, and in-built sound sensitive recorder for capturing the surround sound, wherein the in-built sound sensitive recorder becomes active when it receives any sound higher than permitted limit, and wherein predefined time intervals include at least one of a beginning of the examination, a check out for breaks, check in for breaks, regular time intervals during the examination and an end of the examination; generating comparison data at predefined time intervals by comparing the proctoring data with the registration data of the candidate and evaluating the comparison data at predefined time intervals for determining deviation of the proctoring data from the registration data and based on the comparison data, performing one of: blocking the candidate assessment device during the examination when the proctoring data deviates from the registration data above a permitted limit, and receiving relevant data at the central assessment server from the candidate assessment device at the conclusion of the examination when the proctoring data corresponds to the registration data, wherein the relevant data comprises test response data, the proctoring data and a still picture of the candidate. receiving registration data of a candidate at a central assessment server from the candidate assessment device present in an examination center before beginning of an examination, wherein the registration data comprises biometric data, a still image and a surround sound associated with the candidate; performing one of the registration and validation of identity of the candidate by comparing the registration data with the data previously stored in the central assessment server, wherein the previously stored data is a data stored by an exam conducting body in the central assessment server prior to the beginning of the examination; communicating a test question data from the central server to the candidate assessment device for initiating the examination, in response to the validation of the identity of the candidate; receiving proctoring data captured by the candidate assessment device of the candidate via a master control device at the central assessment server at predefined time intervals during the examination, wherein the proctoring data comprises biometric data, a still image, and a surround sound associated with the candidate, and wherein the candidate assessment device is a handheld device, and wherein the candidate assessment device is equipped with in-built security sensor for capturing the biometric data, an in-built camera for capturing the still image, and in-built sound sensitive recorder for capturing the surround sound, wherein the in-built sound sensitive recorder becomes active when it receives any sound higher than permitted limit, and wherein predefined time intervals include at least one of a beginning of the examination, a check out for breaks, check in for breaks, regular time intervals during the examination and an end of the examination; generating comparison data at predefined time intervals by comparing the proctoring data with the registration data of the candidate and evaluating the comparison data at predefined time intervals for determining deviation of the proctoring data from the registration data and based on the comparison data, performing one of: blocking the candidate assessment device during the examination when the proctoring data deviates from the registration data above a permitted limit, and receiving relevant data at the central assessment server from the candidate assessment device at the conclusion of the examination when the proctoring data corresponds to the registration data, wherein the relevant data comprises test response data, the proctoring data and a still picture of the candidate.