Airport security startup Zamna announced that it has raised a $5 million seed funding round led by LocalGlobe and Oxford Capital.Seedcamp, the London Co-Investment Fund (LCIF), Telefonica, and a number of angel investors also participated in the round, as well as existing investor IAG (International Airlines Group).Zamna, previously known as VChain Technology, uses a blockchain to safely share and verify data between airlines and travel authorities to check passenger identities. IAG is now its first commercial client."With passenger numbers expected to double in the next 20 years, new technology-driven solutions are the only way airlines, airports and governments will be able to cope. We're delighted to be working with the Zamna team and believe they can play a key role in addressing these challenges," Remus Brett, partner at LocalGlobe, said, according to reports.