> “If you have an apple and I have an apple and we exchange these apples, then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas.” Doom Defense offers a collection of notes developed and shared for individuals and professionals engaged in cybersecurity, network security, state satellite hacking, and the study of hacking methodologies. The content herein is provided to facilitate learning, research, and the advancement of knowledge in these specialized areas. This website/documentation is licensed under the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation. This license ensures that the content is free to copy, modify, and redistribute, provided that all copies and derivatives are made available under the same license. The full text of the license can be accessed [here](https://www.gnu.org/licenses/fdl-1.3.en.html).