LONDON - Callsign, the digital trust pioneer, has been invited by the World Economic Forum to join its Global Innovators Community; a group of the world's most promising start-ups and scale-ups that are at the forefront of technological and business model innovation. The World Economic Forum provides the Global Innovators Community with a platform to engage with public and … [Read more...] about Callsign is invited to join the World Economic Forum’s Global Innovators Community