Kaspersky defends antivirus firm

The Russian antivirus provider Kaspersky sells its products worldwide - but now the Trump administration has ordered US government agencies to stop using the company's products. The BBC's Rory Cellan-Jones speaks to Eugene Kaspersky.

Later in the programme, Brian Merchant, the author of the One Device, an account of the birth of the iPhone and its impact on the world, says he doesn't think that another revolution had been unleashed by Apple.

During the recent hurricane and flooding in Texas, an app called Zello which turns a phone into a sort of walkie-talkie was widely used by people trying to get help. We speak to Holly Hartman, a teacher at Memorial High School in Houston, who used the Zello app to help co-ordinate rescue efforts.

And following the Equifax hack, British entrepreneur Nick Halstead says we need to decentralise data.

Rory is joined by BBC Technology reporter Zoe Kleinman.

(Eugene Kaspersky, chairman and CEO of Kaspersky Lab, in New York. Photo credit: Reuters.)