I may have a stupid question but... While I really enjoy Theo's talks and writings, I wonder if the fact that the VCS is CVS ain't a security issue in itself? It's been really a long time I haven't used CVS but I remember that attempt to introduce backdoors in projects using Git as a (D)VCS have been caught (it was in the Linux kernel I think). IIRC some attempts were caught precisely because it's hard to fake SHA ha…
[1]: http://arstechnica.com/security/2013/09/who-rooted-kernel-or...