Watch this BBC video in which Eugene Kaspersky defends his company's reputation. It will be interesting to see the long-term impact on a private company caught in country-level political crossfire.
Eugene Kaspersky has denied that the cyber-security firm he founded is close to the Russian government and insists it poses no danger to its American customers. Mr Kaspersky told the BBC that the Trump administration's move to ban government agencies from using his products was an "uncomfortable situation". The US has said it is concerned that Kaspersky is vulnerable to influence from the Kremlin. But the company's founder said that while he lived in Moscow and his firm co-operated with Russian law enforcement on cyber-security, there were no deeper ties. "When they say we have strong ties with Russian espionage it's not true," he told me via a video call from Argentina. "We co-operate with many law enforcement agencies around the world - in the past with the US as well."