Your scheme suffers from low Kolmogorov complexity http://en.wikipedia.org/wiki/Kolmogorov_complexity http://en.wikipedia.org/wiki/Kolmogorov_complexity You'r

Your scheme suffers from low Kolmogorov complexity http://en.wikipedia.org/wiki/Kolmogorov_complexity http://en.wikipedia.org/wiki/Kolmogorov_complexity You're better off just doing something like concatenating a secret password with the fully qualified domain name and sha256'ing that and using that. Or using a "correct horse battery staple" XKCD password generator (I'd use 5 or 6 random words, though, at this point).