To be fair:
The problem is not that it is always listening, as this is only be done to simplify the use as you can say Alexa <Command> without having to wait for until the the echo is ready.
As soon as it recognized "Alexa" it will use the part afterwards as command.
More details in the FAQ:
[...] 2. How does Alexa hands-free on my Fire tablet recognize the wake word?
Alexa on your Fire tablet uses on-device keyword spotting to detect the wake word, even when your device is in standby mode. When the wake word is detected, Alexa on your Fire tablet streams audio to the Cloud, including a fraction of a second of audio before the wake word [...]
What is much worse:
In the default configuration it storing every command you have ever said at Amazon. With this data you can create a perfect profile and this shouldn't be enabled by default.
The regarded voice command should be transferred to the voice recognition server for analysis and the data should then be deleted as there is no technical reason to store it.
I have doubts that they only do so in order to improve their service by analyzing the voice data to give more accurate results.
This should be something that is done via opt-in and maybe with a reward:
"thank you for being completely transparent, you'll get a 10eur Amazon Voucher and a free copy of '1984'".
I agree that it is dangerous to have such a device at home which doesn't have a hardware kill-switch for the microphone.
But much worse is what they're already got doing without hiding it from their users.
I was shocked when a friend showed me his Amazon echo and then said:
"Here look at the list about every command I have used so far, isn't this cool?"
The danger is clearly the user who even agrees and likes this kind of "feature" and the usability of those products is so easy, that everything with adds more security feels complex.
That's a main motivation for me willing to contribute documentation so that Qubes is easy to use do use, for those who are interested in privacy but are not technical experts / Linux powerusers.
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