[kaffeemitsahne]

Was there ever a followup blogpost?

[matthewdgreen]

Nope. Seny Kamara managed to write such a good series that you're better off treating his posts as the follow up:

http://outsourcedbits.org/2012/06/26/applying-fully-homomorp...

http://outsourcedbits.org/2012/09/29/applying-fully-homomorp...