CZ: Sign is a company in the YZiLabs portfolio.

BlockBeats News, September 23rd, CZ retweeted a tweet about "Sign launching a blockchain technology stack, S.I.G.N., designed specifically for sovereign nations," stating, "I might have helped a little in this. Of course, just had a chat, didn't write any code. Connected a few dots in a couple of countries, made some introductions. Sign is a company in the YZiLabs investment portfolio (YZiLabs being a minor shareholder)."