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When agents with the NSA's Tailored Access Operations (TAO) division want to infiltrate a network or a computer, they turn to their technical experts. This particular unit of the United States intelligence service is known internally as ANT. The acronym presumably stands for Advanced Network Technology, because that's what the division produces -- tools for penetrating network equipment and monitoring mobile phones and computers. ANT's products help TAO agents infiltrate networks and divert or even modify data wherever the NSA's usual methods won't suffice. You can read more about the TAO division, its strengths and tricks in a SPIEGEL feature that was published in English on Sunday.
SPIEGEL has obtained an internal NSA catalog describing ANT's various products, along with their prices. A rigged monitor cable, for example, which allows "TAO personnel to see what is displayed on the targeted monitor," goes for $30 (€22). An "active GSM base station" that makes it possible to mimic the cell phone tower of a target network and thus monitor mobile phones, is available for $40,000. Computer bugging devices disguised as normal USB plugs, capable of sending and receiving data undetected via radio link, are available in packs of 50, for over $1 million.