Yeah, those parts are easily available on Aliexpress in droves. Imagine this in the crowded subway.
"hey siri" "show me pictures of CENSORED" "send the first picture to mom" "yes, send it"
:S
"hey siri" "show me pictures of CENSORED" "send the first picture to mom" "yes, send it"
:S
Speech fingerprinting, much like actual fingerprints, is not a reliable way to establish identity, especially if you want to avoid false negatives as you probably would in mass consumer facing technology.
I take that as, Siri is probably not trained to only the wake-up phrase, and as such, seems to be _not_ trained to the voice at all since this attack worked.
That, or poorly trained. Don't know, can't verify.