At the recent DEFCON conference held in Las Vegas, hackers demonstrated how quickly voting machines could be compromised. In about 90 minutes, 30 machines from recent elections were breached. To gain a deeper understanding of how this could be possible, tune into this interesting podcast that features NPR/Fresh Air’s Terry Gross interviewing cyber journalist/author Kim Zetter.

To set context, Gross explains that our voting infrastructure is aged beyond function. “Most of the electronic touch screens and optical scan voting systems are more than 10 years old. They’re too old to download the latest security patches.”

Listen to the podcast here. Or, if you prefer, read the transcript.