Computer immunology

Natural immune systems protect animals from dangerous foreign pathogens, including bacteria, viruses, parasites, and toxins. Their role in the body is analogous to that of computer security systems in computing. Although there are many differences between living organisms and computers, the similarities are compelling and could point the way to improved computer security. 1 Improvements can be achieved by designing computer immune systems with some of the important properties of natural immune systems, including multilayered protection; highly distributed detector, effector, and memory systems; diversity of detection ability across individuals; inexact matching strategies; and sensitivity to most new foreign patterns. Some of these properties are well known but seldom implemented successfully; other properties are less well known. The immune system provides a persuasive example of how they might be implemented in a coherent system.