Those of you who use my Gentoo repository mirrors may have noticed that the repositories are constructed of original repository commits automatically merged with cache updates. While the original commits are signed (at least in the official Gentoo repository), the automated cache updates and merge commits are not. Why?
Actually, I was wondering about signing them more than once, even discussed it a bit with Kristian. However, each time I decided against it. I was seriously concerned that those automatic signatures would not be able to provide sufficient security level — and could cause the users to believe the commits are authentic even if they were not. I think it would be useful to explain why.