Security in Open Systems

Last week in one of the tutorials the subject of open security systems came up. I tried to explain how open systems can encourage security and that knowing all of the details of the security of a system actually translates into a more secure real world system, mainly because the security doesn't rely merely on keeping secrets but on good engineering. Anyhow, here is an article on the security of the nascent Mastercard Chip Authentication Program that explains some of the issue.