Innovation: The tech refresher Russia's spies neededNew ScientistAnd they used shortwave radio to contact Russia. Just what you'd expect spies to do – but with all these technologies they blundered in ways that made the …and more »
Experts urge clear procedure for community radio operationNigerian Compass (blog)Their signals may reach only a kilometer, cover a whole country or be carried via shortwave […]
Intelligence workManila BulletinOther means used were the standard spy shortwave bursts transmission or in invisible ink. The New York Times news account also said "the […]