jm + cortana   3

'DolphinAttack: Inaudible Voice Commands' [pdf]
'Speech recognition (SR) systems such as Siri or Google Now have become an increasingly popular human-computer interaction method, and have turned various systems into voice controllable systems(VCS). Prior work on attacking VCS shows that the hidden voice commands that are incomprehensible to people can control the systems. Hidden voice commands, though hidden, are nonetheless audible. In this work, we design a completely inaudible attack, DolphinAttack, that modulates voice commands on ultrasonic carriers (e.g., f > 20 kHz) to achieve inaudibility. By leveraging the nonlinearity of the microphone circuits, the modulated low frequency audio commands can be successfully demodulated, recovered, and more importantly interpreted by the speech recognition systems. We validate DolphinAttack on popular speech recognition systems, including Siri, Google Now, Samsung S Voice, Huawei HiVoice, Cortana and Alexa. By injecting a sequence of inaudible voice commands, we show a few proof-of-concept attacks, which include activating Siri to initiate a FaceTime call on iPhone, activating Google Now to switch the phone to the airplane mode, and even manipulating the navigation system in an Audi automobile. We propose hardware and software defense solutions. We validate that it is feasible to detect DolphinAttack by classifying the audios using supported vector machine (SVM), and suggest to re-design voice controllable systems to be resilient to inaudible voice command attacks.'

via Zeynep (
alexa  siri  attacks  security  exploits  google-now  speech-recognition  speech  audio  acm  papers  cortana 
24 days ago by jm
Sirius: An open end-to-end voice and vision personal assistant and its implications for future warehouse scale computers
How to build an Intelligent Personal Assistant:

'Sirius is an open end-to-end standalone speech and vision based intelligent personal assistant (IPA) similar to Apple’s Siri, Google’s Google Now, Microsoft’s Cortana, and Amazon’s Echo. Sirius implements the core functionalities of an IPA including speech recognition, image matching, natural language processing and a question-and-answer system. Sirius is developed by Clarity Lab at the University of Michigan. Sirius is published at the International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) 2015.'
sirius  siri  cortana  google-now  echo  ok-google  ipa  assistants  search  video  audio  speech  papers  clarity  nlp  wikipedia 
april 2015 by jm
"Everything you've ever said to Siri/Cortana has been recorded...and I get to listen to it"
This should be a reminder.
At first, I though these sound bites were completely random. Then I began to notice a pattern. Soon, I realized that I was hearing peoples commands given to their mobile devices. Guys, I'm telling you, if you've said it to your phone, it's been recorded...and there's a damn good chance a 3rd party is going to hear it.
privacy  google  siri  cortana  android  voice-recognition  outsourcing  mobile 
march 2015 by jm

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