Smart speakers like The Amazon Echo Dot have already found their way into many households. For the convenience of not having to get up to switch on the lights or to reach into the pocket to check the weather on the smartphone, millions of smart devices are constantly listening to their owners, waiting to be activated by hearing their wake word.

But do inactive smart speakers really keep our data for themselves? Are they still just patiently waiting for their wake word or are our private conversations too tempting for advertisement and surveillance?