Defensive Techniques to Increase Computer Security

A computer-implemented method, the method comprising:

• initializing a descriptor table, wherein the descriptor table is initialized by an operating system kernel and is associated with a hardware processor;
• changing a permission level associated with the descriptor table to a first permission level;
• and
• in response to an update request,
• changing the permission level associated with the descriptor table to a second permission level, wherein the second permission level is greater than the first permission level;
• updating the descriptor table while the descriptor table is associated with the second permission level, wherein the updating is based on the update request;
• and
• after updating the descriptor table, changing the permission level associated with the descriptor table to the first permission level, wherein the operating system kernel changes the permission level associated with the descriptor table.