In last Thursday's episode, we talked about one of the most sophisticated intelligence operations in recent history, when Israel planted bombs in thousands of pagers and walkie-talkies used by Hezbollah.

But it wasn't the first time something like this has happened. Today, Matt and Kara trace the long history of people accidentally spying on themselves: from the CIA's best-selling encryption machines, bought by governments around the world, to the "secure" phones that tricked organised criminals into incriminating themselves.

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Check out our series on YouTube: https://www.youtube.com/playlist?list=PLDTPrMoGHssAfgMMS3L5LpLNFMNp1U_Nq