These and other classified documents provided by former NSA contractor Edward Snowden reveal that the NSA has developed technology not just to record and transcribe private conversations but to automatically identify the speakers.
Americans most regularly encounter this technology, known as speaker recognition, or speaker identification, when they wake up Amazon’s Alexa or call their bank. But a decade before voice commands like “Hello Siri” and “OK Google” became common household phrases, the NSA was using speaker recognition to monitor terrorists, politicians, drug lords, spies, and even agency employees.
The technology works by analyzing the physical and behavioral features that make each person’s voice distinctive, such as the pitch, shape of the mouth, and length of the larynx. An algorithm then creates a dynamic computer model of the individual’s vocal characteristics. This is what’s popularly referred to as a “voiceprint.” The entire process — capturing a few spoken words, turning those words into a voiceprint, and comparing that representation to other “voiceprints” already stored in the database — can happen almost instantaneously. Although the NSA is known to rely on finger and face prints to identify targets, voiceprints, according to a 2008 agency document, are “where NSA reigns supreme.”
It’s not difficult to see why. By intercepting and recording millions of overseas telephone conversations, video teleconferences, and internet calls — in addition to capturing, with or without warrants, the domestic conversations of Americans — the NSA has built an unrivaled collection of distinct voices. Documents from the Snowden archive reveal that analysts fed some of these recordings to speaker recognition algorithms that could connect individuals to their past utterances, even when they had used unknown phone numbers, secret code words, or multiple languages.
Gary Edwards on 15 Jul 09Om Malik has an interesting commentary on Google Voice, the Android OS, and a new gVoice application for iPhones and Androids. For sure, new gVoice app meshes into the Andorid OS as if it were hard coded into the silicon. I left a lengthy comment in the discussion section describing my experiences with gVoice and what i see emerging as Google's Unified Productivity Platform. Of course, gWave, Chrome, Chrome OS, webkit-HTML+, and the sweep of Google Web applications and service come into play. Excerpt: Can Google be your phone company? The answer is yes. I came to that conclusion after I met with Vincent Paquet, co-founder of GrandCentral (a company acquired by Google) and now a member of the Google Voice team. Earlier today he stopped by our office to show the mobile app versions of its Google Voice service for Blackberry and Android. Google recently announced that it was going to make the Voice service widely available to users in the U.S. soon.
