The transaction was conducted by Coinkite founder, Radolfo Novak, through the use of his HAM radio. Initially, Novak’s (highly valuable) radio signal was not being received or acknowledged. Leading him to almost scrap the experiment before it even took off. To his luck, the signal was picked up the next via a “software defined-radio” – which is basically a computer masquerading as a radio – and responded. The more exciting part of this relay? Noval was conducting this experiment during a blinding snowstorm.
— DETERMINISTIC OPTIMISM (@nvk) February 11, 2019 The success of the experiment is important since it now presents another avenue of transacting cryptocurrency without the use of the internet. There is one caveat to this method; according to Novak, sending an encrypted communication over a HAM radio is not permitted. Unless the cypher that encrypts it is made public. (Source: Bitcoinist)