Editing Computer security (section)

===Robert Morris and the first computer worm===
{{Main|Morris worm}}

In 1988, 60,000 computers were connected to the Internet, and most were mainframes, minicomputers and professional workstations. On 2 November 1988, many started to slow down, because they were running a malicious code that demanded processor time and that spread itself to other computers – the first internet [[computer worm]].<ref name="multiple">Jonathan Zittrain, 'The Future of The Internet', Penguin Books, 2008</ref> The software was traced back to 23-year-old [[Cornell University]] graduate student [[Robert Tappan Morris]] who said "he wanted to count how many machines were connected to the Internet".<ref name="multiple" />