
Community Admin
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Jam Detection Update
RF Jamming is a technical reality. All devices that use wireless communications protocols can be jammed. The good news is, a) this is *not* a known attack vector for home security, because it's not a reliable way to enter and move about a home undetected, and b) we have a jam detection algorithm that is being constantly tuned and updated behind the scenes, which notices if someone is trying to jam your system and alerts you. More on that below:
A little tech talk:
First we'd like to highlight one of the most annoying issues in detecting jam attacks: False positives are a huge problem. Radio signal "noise' is everywhere and intermittent. So for some customers these alerts could become annoying -- and potentially harmful if they created the incorrect feeling that their system isn't working. We are constantly tuning our detection algorithm to get better and better at differentiating between normal, ubiquitous RF interference and actual, concerning jamming activity without frustrating you with a barrage of nuisance alerts.
Second, jamming without being detected would be extremely difficult, as is clear in the Youtube video. The jam detection was triggered several times by the tester. Our system's array of multiple sensors and cameras (layers of protection), wireless communications protocols and jam detection algorithm work together to make it very hard for anyone to interfere with your system undetected.
Here's why:
The jamming demonstrated is under controlled conditions, with the "jammer" in close proximity to the base station and the sensor which is transmitting. Our testing shows that moving the jammer to another area away from the base station and having the sensor closer to the base station, the sensor could still communicate with the base station. Also, if the jammer is tuned too close to our transmission frequency, as it moves closer to the base station, it will trigger the RF jamming warning. In other words, prior knowledge of the layout of our motion sensors, door sensors and base station in the customers home and a rehearsal of how to move about the home would be necessary to confidently select a frequency that will both jam and not be detected -- let alone on the first try. Plus they would have to keep the jamming interference in that range for the entire time needed to pull off a burglary, while continuing to avoid detection. It's not impossible...but we're continuously improving our system to make it increasingly impossible.
We frequently tune our detection parameters and release security and usability updates. We are in the process of another round of detection algorithm tuning which will continue to refine our ability to differentiate between the brief interference noise that typically occurs in many homes, and actual bad actors. This update has been in the works for a while -- it's currently in beta and will be released remotely in a month or so.
Also, SimpliSafe already offers video verification -- an opt-in service where, in the event of an alarm, our professional monitoring center views video from your home, prioritizing it for the police. This enhances police response times when real alarm events are in progress, and cuts down on false alarms and unnecessary police dispatches. In the near future, we will offer video verification for potential interference events, where experts at our monitoring center can review footage and determine if police dispatch is warranted.
Finally, a reminder (found in this CNET article):
"The most likely burglary scenario by far is the unsophisticated crime of opportunity, usually involving a broken window or some other kind of brute-force entry. According to the FBI, crimes like these accounted for more than half of all residential burglaries in the US in 2017. The wide majority of the rest were unlawful, unforced entries that resulted from something like a window or a garage door being left open. The odds of a criminal using technical means to bypass a security system are so small that the FBI doesn't even track those statistics.'
We are a company that focused on protecting you, which means we work on protecting you against even unlikely scenarios like this.

jrref
15 Messages
4 years ago
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shiherlis
Advocate
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719 Messages
4 years ago
Now my question is, how far away can the system's sensors be defeated.
@coltmaster
I have unable to review the footage but hope to get through it today.
I live in a gated community and mainly know who belongs and who does not. So the individual stuck out. I noticed him on camera both times. He parked directly in front of my residence the second instance. I was watching him in real-time, just sitting in his car. He got out, went to his trunk, etc. Just as I was about to phone the police, he saw a neighbor arrive home, and immediately left. That let me know a bit. My guess is he did not believe anyone was present, inside. There is absolutely no reason for a stranger to come park (or even linger on foot) in front of my home - primarily due to its location.
I did make a call yesterday, and the police did a sweep last night/early morning (I saw them on camera).
I could be wrong in my theory, but the loss of Internet both times he was present when it never goes out, along with the mysterious disarming of the alarm (that has never happened before), and the lack of license plates all seems strange. Nothing like it has occurred prior.
Or it could all be nothing.
One issue that I had no control over was I had to have numerous work done in my home lately. My place is only years old, but I have had quite the issues. For a while, I had different workers in and out weekly, 3-4 (in a group) at a time. I was always present, never gave anyone a PIN, and never left them alone in any area to do work - unless they split up and were doing so on different floors and I could not avoid it. My only concern was them seeing the Keypad - even with the logo covered. SimpliSafe's Keypads are unique looking, and I recall thinking at the time that I should have perhaps removed it from the wall before they entered my home due to that. If you have ever seen a SimpliSafe advertisement, unfortunately (or fortunately - depends on how you look at it) you know the brand. I was always smart enough to disarm the system before their arrival and never arm it immediately after they departed (for precautionary reasons - them hearing it).
Or, to the above preventive measure, it could have been someone who happened to hear the Base Station's announcement. Far-fetched I know, but if anyone has ever been inside of my home, they know there is a lot to be had. And since I work from home, most people (even my neighbors) have no idea I am here.
There were honestly so many people coming and going; it could certainly be a worker. Or, it could be nothing at all. I would have to go through months of footage to confirm.
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whoaru99
1.3K Messages
4 years ago
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coltmaster1
Advocate
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2.8K Messages
4 years ago
I hope both you and security can find the necessary time (asap) to view the videos, these need to be handed to the police. Who knows how many people/homes/etc this stranger could be targeting, you could even be preventing him from harming someone.
As far as I know, the base, the base's wall adapter, keypads and video doorbell have the SS logo, not sure about the cams, smoke detectors or CO detectors, as I don't have them. But, even if you had a keypad's logo covered, everyone and their dog knows what SS system and components look like (thanks tv advertising and youtube).
I would call SS, as they claim they know if a system has been jammed (and supposedly the user would be alerted, but some testers did not find this to be true). Ask for a senior supervisor to see if they can determine any jamming signal during the times your wifi cut out, and particularly the disarming event (take note of the actual times to compare with SS's findings).
Does your association have meetings you could attend to voice your concerns about not having input on worker's entering the community?
In any case, you have every reason to be concerned - please do everything you can to check your videos and if the security people are lax, get the police to get it from them. Having all of this on record with a PD detective could prove useful if needed in the future. (and Deep Sentinel, not a bad idea except for the cost!)
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sevensiamesecats
Advocate
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2.2K Messages
4 years ago
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coltmaster1
Advocate
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2.8K Messages
4 years ago
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johnschnupp
6 Messages
4 years ago
Watched the videos, interesting. I am a ham radio operator so...yep, gotta test it. First off, the channel spacing in the ham radio bands is at 25KHz, that would be transmitting at 433.900, 433.925, 433.950, etc. At 1W transmitted power my SS3 base station gave the wireless interference detected from 433.800-434.000Mhz...this was from a fully legal ham radio transmitter being operated within the legal frequency range and by a fully licensed Extra (highest) class operator. I also tested at the low power level of 500mW with the same results. One other thing I noticed while monitoring on the 433.925MHz frequency was that there was occasional squelch and interference noise on my handheld ham radio.
Basically the FCC rules are that secondary users (SimpliSafe, in this case) are not allowed to cause interference to the primary users (ham radio, in this case). Additionally, secondary users must accept interference from primary users. The short version is that any interference from legal ham radio transmissions is the responsibility of SS to fix. SS need to design their systems to be robust enough so that legal RF in the band does not cause problems to their devices. In the US the maximum power level for ham radio transmissions is 1,500W PEP.
I tested the SimpliCam wifi. The video signal for the wifi is not effected, but that is operating in the 2.4GHz band (I don't know the exact frequency). So the advice about having the interference sent as a secret alert and then checking your cameras is valid.
It looks like SS has some engineering work to do. I don't know that type of emission they are using or how it is encoded. Based on their advertising (of which I consider to be somewhat gray) they are using a "deep" encryption (the SimpliCam claims 256bit). I suspect that the encryption level is good enough but they need a product that can withstand more robust RF fields. IMO, the best option would be wide band spread spectrum, this type of transmission/reception is generally the most resistant to RF interference.
As a brand new SS user, I do have concerns about the system, both this interference issue and several others...but in the end, I think SS is a decent system. Any system can be defeated, it all depends on the effort that someone want to put into it. Most common crooks are not likely to roaming around with a trunk full of high tech jamming, interference and encryption cracking equipment. I'm sure that SS will continue to improve their products. My wife feels safer already.
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jrref
15 Messages
4 years ago
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captain11
Captain
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5.6K Messages
4 years ago
If you have the 24.99 interactive plan (which I do and highly recommend) push notices on your app is the quickest and surest way to be notified.
BTW, sleep well as you have to know exactly where the sensor is and place the fob directly between the sensor and the location of the base. If the intruder doesn't have that information, the alarm will trip.
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coltmaster1
Advocate
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2.8K Messages
4 years ago
SS has claimed in the past this message is a result of "local" interference, i.e. garage door openers, and other low-frequency things, possibly even being too close to your router...
https://simplisafe.com/forum/customer-support-forum/installing-and-using-simplisafe/wireless-interference-detec-0
That said, do ask a supervisor if they can provide additional info/troubleshooting.
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sh2402
263 Messages
4 years ago
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coltmaster1
Advocate
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2.8K Messages
4 years ago
I honestly don't know what to make of it, as we never do ever get a straight answer from SS. But, did you ask if they can detect interference (and have a log of such), that isn't related to a user's system? Apparently, they have hinted at that (jamming), but they have yet to tell the rest of us how they would handle it or if the user would be notified. That, I think, is a problem!
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sh2402
263 Messages
4 years ago
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coltmaster1
Advocate
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2.8K Messages
4 years ago
I guess I would call and get a supervisor to answer the questions. I.e., what is SS' protocol for a potential jamming event, how does the customer detect it, and what is SS' protocol for alerting the customer of such an event?
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sh2402
263 Messages
4 years ago
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