Thanks. From your (2), makes me sad: > The term "zero-knowledge" was popularized by backup service SpiderOak, which later switched to using the term "no knowle

Thanks. From your (2), makes me sad: > The term "zero-knowledge" was popularized by backup service SpiderOak, which later switched to using the term "no knowledge" to avoid confusion with the computer science concept of zero-knowledge proof. Regarding title, missed that as it was truncated on my phone, appologies to OP.