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    Let’s CatCh uP

                        Name three ways to keep your computer in good physical condition.
                        1.  ____________________       2.  ____________________      3.  ____________________

                             PROTECTING YOUR COMPUTER FROM ILLEGAL ACCESS

                      You have learnt how to keep your computer physically fit. It is equally important to prevent the damage
                      or misuse of data, software or hardware and to restrict unauthorised access to your computer.
                      One of the ways to prevent the misuse of data or software is through authentication. Authentication
                      is the process of verifying a user’s identity before granting access to a computer system. In private
                      and public computer networks (including the Internet), authentication is typically done through the
                      use of login passwords. Knowledge of the password is assumed to confirm that the user is authentic.

                      Some of the authentication procedures as follows:
                           Password Protection: Protecting your computer with a password is an important step to keep the

                         data of computer safe from unauthorised use. A password is a word or collection of characters used
                         for user authentication to verify identity or gain approval to access the computer. The password
                         should be kept secret from individuals who are not authorised to access your computer.
                           Biometric Authentication: Biometric authentication is a  process in  which  biological
                         characteristics such as finger print, face and retina are used to
                         verify the identity of an individual. In this process, a biometric
                         device is used to capture the biological details of a person

                         and compares with the existing data stored in computer. It is
                         an automated method of recognising a person’s identity by
                         using their biological characteristics. Some type of biometric         Biometric Authentication
                         authentication are as follows:
                            (i)   Face Recognition: Face recognition is the process of identifying an individual their facial features.
                             A biometric device captures an image or video of the person’s face. This image is transformed
                             into a unique faceprint using a technique called 'elastic graph matching'. The faceprint is then
                             sent to a back-end database for comparison and possible matching. Algebraic algorithms are
                             used to achieve an accurate match. Currently, face recognition technique is most widely used
                             in smartphones.

                                                                  Tech Fact

                            Biometrics have been used during prehistoric times.
                            The Chinese used fingerprints in the 14th century for identification purposes.

                            In the 17th century, fingerprints were used to seal official documents.

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