WEBVTT 00:01.590 --> 00:08.850 The default security mechanism that's available with the operating system uses file permissions. 00:08.850 --> 00:14.310 This is what we refer to as discretionary access control. 00:14.310 --> 00:22.980 We call it discretionary because basic object permissions are subject to the whims of the object owner. 00:22.980 --> 00:32.070 This simply means the owner of a file or process can grant access to that object to any other user on 00:32.130 --> 00:33.660 the system. 00:34.140 --> 00:44.580 As such if users refuse to adhere to strict security practices the safety of the operating system can 00:44.580 --> 00:47.510 be seriously affected. 00:47.550 --> 00:55.460 SC Linux removes this problem by adding an extra layer of security to the operating system. 00:55.470 --> 01:03.240 This is called Mandatory Access Control because when activated it becomes compulsory and can not be 01:03.240 --> 01:06.860 ignored or bypassed by anyone on the system. 01:07.200 --> 01:08.490 Not even vert.