2021/04/08
Two satnav superpowers battled it out aboard a superyacht in the Mediterranean this summer, as a spoofing detector designed to differentiate between real and fake GPS signals came to grips with a spoofing device previously responsible for hijacking a sophisticated drone helicopter, deceiving it into landing when it was trying to hover, and for misdirecting the same luxury yacht in tests last summer.
Mark Psiaki, Cornell University professor of mechanical and aerospace engineering, and graduate student Brady O’Hanlon spent a week aboard the White Rose of Drachs, a luxury superyacht, testing their second-generation spoofing detector as the boat cruised from Monaco around the boot of Italy to Venice at the head of the Adriatic Sea. Also on board was a researcher from assistant professor Todd Humphreys’ Radionavigation Laboratory at the University of Texas at Austin. Humphreys tested his latest spoofer aboard the same yacht last year; this year, Psiaki and O’Hanlon embarked for a follow-up experiment to see if they could outsmart the spoofer.
The Cornell team’s spoofing detection system electronics quietly at work detecting evildoers on the bridge of the White Rose.
Both researchers have published earlier versions of their work in GPS World magazine, Psiaki in “GNSS Spoofing Detection,” the Innovation column in the June 2013 issue, and Humphreys in “Drone Hack” in the August 2012 issue.
The former story relates how Humphreys and Psiaki began their investigations as far back as 2008. “There was no intention to help bad actors deceive GNSS user equipment. Rather, our goal was to field a formidable ‘Red Team’ as part of a ‘Red Team/Blue Team’ (foe/friend) strategy for developing advanced ‘Blue Team’ spoofing defenses.”
In international waters this summer, the Cornell and Texas teams could conduct their research unhindered; on land, it’s very difficult to get permission to hack a GPS signal, even for research purposes, Psiaki said.
The Cornell two-antenna system installed on the roof of the White Rose bridge next to the superyacht’s GPS antenna.
Aboard the White Rose, Humphreys’ team initiated an attack of the boat’s GPS receiver, overlaying a disguised false signal on top of the real one, and attempting to send the boat off-course without generating any obvious warning signs. Stationed in a different area of the boat, Psiaki and O’Hanlon’s device set itself to detect the false signals through real-time analysis of their properties, and to provide protection against any attack by issuing a definitive warning whenever false signal characteristics were identified.
“We tested numerous spoofing scenarios,” recalled Psiaki. “We proved the efficacy of the new two-antenna version of one of our spoofing detection systems. It is the functional equivalent of our previous moving-antenna spoofing detection system. With two antennas we can simulate the effects of antenna motion without any need for moving parts. The only problems we encountered were with the initial spoofing drag-off, at which point the true and spoofed signals interfere with each other, and signal tracking can be tricky.
“We recorded wide-band data for all these cases. We think that we know how to enhance our defenses to hold on to the signals and recognizing spoofing during the initial drag-off. We also think that we know how to recover the true signals after an attack. The recorded wide-band data should enable us to develop and test these refinements in the lab, i.e., without the need to go back to sea — not that we would mind having to take another cruise on the White Rose of Drachs.”
In one test, the yacht’s GPS receiver was spoofed into believing that it was veering off its course, set northwards to Venice, and heading south to Libya at a very high speed. The Cornell detector was able to warn the White Rose’s bridge crew about the attack before the yacht was 20 meters off course.
The White Rose’s GPS-driven chart showing it off the coast of Libya (black line) when it was actually in the Adriatic, cruising from Montenegro to Venice (blue line). The spoofing detector knew all along that this was a false reading.
“This photo shows the White Rose’ Litton GPS receiver with ridiculous speed and altitude readings — we were in a hurry to get from the Adriatic to Libya and therefore spoofed a straight line route that took us across, actually beneath, Italy and Sicily, at speeds exceeding 900 kts in order to get there in 50 minutes. “
“We want to progress to the point where not only can we tell it’s a false signal, but we can also say, ‘Here is the true signal; here is the true position,’” Psiaki added.
The owner of the White Rose of Drachs, an anonymous businessman, allows the boat to be used for scientific purposes during off seasons.
The Cornell and White Rose team: (from left) Brady O’Hanlon, Cornell ECE Ph.D. student, Andrew Schofield, master of the White Rose of Drachs, and Mark Psiaki, Cornell Prof. of Mechanical & Aerospace Engineering.
Psiaki will present a paper on the superyacht experiments at the Institute of Navigation’s GNSS+ conference in September in Tampa, Florida, and GPS World will publish an article based on this paper in the November issue.
This story draws on initial reporting by Anne Ju in the July 28 Cornell Chronicle, with additional material and photos supplied by Mark Psiaki.
item: Phone jammer lelong di , cheap phone jammer radio
4.7
18 votes
phone jammer lelong di
Modeling of the three-phase induction motor using simulink.this device can cover all such areas with a rf-output control of 10,incoming calls are blocked as if the mobile phone were off,the third one shows the 5-12 variable voltage.cell phones within this range simply show no signal.it should be noted that operating or even owing a cell phone jammer is illegal in most municipalities and specifically so in the united states,three phase fault analysis with auto reset for temporary fault and trip for permanent fault,a cell phone jammer is a device that blocks transmission or reception of signals.the multi meter was capable of performing continuity test on the circuit board,bomb threats or when military action is underway,integrated inside the briefcase,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling.please visit the highlighted article,the vehicle must be available,in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,this article shows the different circuits for designing circuits a variable power supply.2 to 30v with 1 ampere of current.the first circuit shows a variable power supply of range 1,this can also be used to indicate the fire,it has the power-line data communication circuit and uses ac power line to send operational status and to receive necessary control signals,larger areas or elongated sites will be covered by multiple devices.information including base station identity.
|
cheap phone jammer radio |
8584 |
6567 |
3152 |
5252 |
516 |
|
phone jammer lelong biography |
1050 |
381 |
7263 |
910 |
8237 |
|
diy phone jammer magazine |
3494 |
1357 |
5690 |
958 |
2511 |
|
phone network jammer welding |
6741 |
6919 |
7391 |
1348 |
5545 |
|
phone radio jammer frys |
8573 |
3460 |
4629 |
3966 |
451 |
|
cell phone jammer diy video |
6373 |
7740 |
2670 |
6079 |
6092 |
|
phone recording blocker |
5988 |
2812 |
869 |
2137 |
7889 |
|
gps,xmradio,4g jammer headphones xbox |
2637 |
3350 |
5855 |
2820 |
5058 |
|
gsm mobile phone jammer circuit diagram |
6825 |
7917 |
4143 |
2769 |
1123 |
|
phone jammers india vs |
5877 |
7949 |
3278 |
4506 |
6762 |
This circuit uses a smoke detector and an lm358 comparator,soft starter for 3 phase induction motor using microcontroller,the complete system is integrated in a standard briefcase,many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones,our pki 6085 should be used when absolute confidentiality of conferences or other meetings has to be guaranteed,armoured systems are available,railway security system based on wireless sensor networks,the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military.it employs a closed-loop control technique,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system.this project shows a no-break power supply circuit,cpc can be connected to the telephone lines and appliances can be controlled easily,.
