I've been wondering the same and finding not much. It's hard to find implementations which have technical detail describing the novel problem FHE fixes. https:

I've been wondering the same and finding not much. It's hard to find implementations which have technical detail describing the novel problem FHE fixes. https://www.jeremykun.com/fhe-in-production/ https://www.jeremykun.com/fhe-in-production/ seems worth glancing at, good detail but very few strong examples.