Meaning – In the world of computer security, authorisation means the process of granting access to a certain file or entity, to an interested party. Organisations often exercise a structured approach to authorisation, and this ensures that the managers can oversee the activities of the employees under them, but not the other way round. This helps in maintaining a level of authority in the organisation.
On a more personal level, if you have a PC that has multiple user accounts, then you can restrict access to files on your account, by revoking authorisation of the other users on the PC. In a time where data security is of paramount importance, the process of authorisation is a step forward in ensuring the protection of the data or the files you seek to secure.
Example of usage – “She did not grant authorisation to any of the files on her account as all her friends used the same PC.”