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Police seek Amazon Echo data in murder case

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Re: Police seek Amazon Echo data in murder case

#171
post #76

Earlier quoted context omitted.

Should the police be able to enter any house with locks they can pick? I suppose that would educate people, too. edit: I misread the comment as, " without a warrant"! Ugh

They already can, with a warrant. The lock need not be picked, they'll just bust down the door.

But when you bust the door the owner knows you did that. It's more insidious when they get in covertly to install microphones, search the house and plant substances.

Re: Police seek Amazon Echo data in murder case

#172

Earlier quoted context omitted.

According to others in the thread (i know nothing of this) , it sounds like that is easily verifiable though, and not done. Ie, it sounds like they've monitored the outbound traffic of the device and it only sends Alexa... requests. It's possible that they keep a rolling buffer of all audio in the device though. There could be legitimate reason to hold onto such a window of audio. Would make for an interesting discov…

What would be the legitimate reason to do so? Queries are always preceded by the keyword, so what legitimate reason would there be to record and store audio before the keyword?

"What's the weather going to be like tomorrow, Alexa?"

Re: Police seek Amazon Echo data in murder case

#173
post #142

Earlier quoted context omitted.

That's exactly what Amazon would like there users to think. How do you think he wake work is detected? It MUST be listening to some sort of ambient audio, wether that is recorded or kept in anyway, only Amazon would know.

Amazon doesn't use telepathy. You can inspect the network traffic on your router and the contents of its local storage.

But that won't give you the whole story. They could batch up the network traffic to send later, or push an update that changes how much they listen after your traffic monitoring is done.

Re: Police seek Amazon Echo data in murder case

#174

Earlier quoted context omitted.

It stops listening. No action required. You can check in the Alexa app what is recorded (I just did). You can also check what is sent out to Amazon (which is what I did when I got the first one, using wireshark). The hardware is listening all the time, for the wake word. Nothing is sent until a wakeword is received.

But you don't know what audio data the local device itself is storing as an implementation detail.

Or if your Alexa is turned into surveillance mode from Amazon, on police request or for nefarious reasons.

Re: Police seek Amazon Echo data in murder case

#175
post #2

Alexa only waits for the wake word "Alexa." It would cost more money than God in hardware to store every thing Alexa ever heard. She saves you're requests. And shows you those request in the Alexa App. And you can also delete it if you wish. There is no data for the police to have, because beyond requests, there is no data. Unless someone knows more about this than Amazon is telling us?

> Alexa only waits for the wake word "Alexa."

Maybe it also wakes on "bomb" and "infidel".

Re: Police seek Amazon Echo data in murder case

#176
post #2

Alexa only waits for the wake word "Alexa." It would cost more money than God in hardware to store every thing Alexa ever heard. She saves you're requests. And shows you those request in the Alexa App. And you can also delete it if you wish. There is no data for the police to have, because beyond requests, there is no data. Unless someone knows more about this than Amazon is telling us?

Speech can be encoded with less than 10Kbps [1], which means a maximum of 108MB of data per day. I don't think that's an impossible amount of data. [1] e.g. https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code...

> Speech can be encoded with less than 10Kbps [1], which means a maximum of 108MB of data per day.

People only speak a few hours per day and "interesting" conversations could be sampled from time to time and some Alexa stations flagged for full upload, if they want to know.

Re: Police seek Amazon Echo data in murder case

#177
post #146

The part that listens for the "Alexa" word is analog not digital. It cannot be updated remotely by firmware. Crack open the device, test the analog component and confirm the signal only fires when you speak alexa and nothing else. Having said all that, I wouldn't buy it. NSA is known to temper with devices behind the back of companies (no matter how trustworthy you think Amazon/Google/Apple are). Check what they did…

Have you tried the "infidel" keyword?

Re: Police seek Amazon Echo data in murder case

#178

Earlier quoted context omitted.

you know because they let you access and replay the recordings from their app.

But we don't know that's every recording that they have. They very well could have a "allow_user_to_see_recording" toggle.

No, from day one people have been sniffing Echo traffic to see if it sends any non-triggered data. It does not.

Re: Police seek Amazon Echo data in murder case

#179
post #172

Earlier quoted context omitted.

What would be the legitimate reason to do so? Queries are always preceded by the keyword, so what legitimate reason would there be to record and store audio before the keyword?

"What's the weather going to be like tomorrow, Alexa?"

Allowing that sort of sentence construct violates the privacy afforded by starting with the key phrase. If the Echo did allow this, I would not own one since it would send a lot more unintended sentence fragments to Amazon.

By saying "Alexa" first, it gives me a chance to hear the wake-up tone before I continue my sentence.

So if I'm saying to my friend Alex "Alex uuh, tomorrow we will rob the bank", I have a chance to stop before incriminating myself. But if I say "Tomorrow we'll rob the bank Alex uh... are you in?" and the Echo interprets that as a command, then it's too late, it's already been sent and analyzed.

Re: Police seek Amazon Echo data in murder case

#180
post #142

Earlier quoted context omitted.

Amazon doesn't use telepathy. You can inspect the network traffic on your router and the contents of its local storage.

But that won't give you the whole story. They could batch up the network traffic to send later, or push an update that changes how much they listen after your traffic monitoring is done.

>They could batch up the network traffic to send later,

I was thinking that too, but realistically, someone would eventually discover this (consider how much outbound traffic would have to go at once in order to store that much audio).

>push an update that changes how much they listen after your traffic monitoring is done.

Again, someone would eventually discover this. It wouldn't be hard to constantly monitor network traffic for noticeable discrepancies in outbound activity.

Furthermore, a discovery like this would not go overlooked by the general public. Amazon would be doing a serious disservice to their reputation by going about extracting the audio in such a mischievous manner.

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