RQ170 на вскрытии в Иране

http://www.syssec.ethz.ch/research/ccs139-tippenhauer.pdf
Хорошая статья про не про заглушение GPS, а про подделку координат. Один из выводов: даже гражданский GPS с ненаправленной антенной очень трудно обмануть, если есть несколько разнесённых антенн.

Статья с цитатами о том как это сделали. Иранец говорит что они принудили к посадке в выбранном ими месте.


"The GPS navigation is the weakest point," the Iranian engineer told the Monitor, giving the most detailed description yet published of Iran's "electronic ambush" of the highly classified US drone. "By putting noise [jamming] on the communications, you force the bird into autopilot. This is where the bird loses its brain."

The “spoofing” technique that the Iranians used – which took into account precise landing altitudes, as well as latitudinal and longitudinal data – made the drone “land on its own where we wanted it to, without having to crack the remote-control signals and communications” from the US control center, says the engineer.

The techniques were developed from reverse-engineering several less sophisticated American drones captured or shot down in recent years, the engineer says, and by taking advantage of weak, easily manipulated GPS signals

Western military experts and a number of published papers on GPS spoofing indicate that the scenario described by the Iranian engineer is plausible.

"Even modern combat-grade GPS [is] very susceptible” to manipulation, says former US Navy electronic warfare specialist Robert Densmore, adding that it is “certainly possible” to recalibrate the GPS on a drone so that it flies on a different course. “I wouldn't say it's easy, but the technology is there.”

That interview has since been pulled from Fars’ Persian-language website. And last month, the relatively young Gholizadeh died of a heart attack, which some Iranian news sites called suspicious – suggesting the electronic warfare expert may have been a casualty in the covert war against Iran.

Iran displayed the drone on state-run TV last week, with a dent in the left wing and the undercarriage and landing gear hidden by anti-American banners.

The Iranian engineer explains why: "If you look at the location where we made it land and the bird's home base, they both have [almost] the same altitude," says the Iranian engineer. "There was a problem [of a few meters] with the exact altitude so the bird's underbelly was damaged in landing; that's why it was covered in the broadcast footage."

Судя по этому они взломали код и могут генерировать собственный сигнал.