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So why were people so annoyed when a video was posted showing how to bypass alarms?

I have a jammer sat right in front of me. It stops the non-graded alarms and a number of grade 2 alarms from working.

Indeed it does. I've only ever looked at two of the alarms installed, and both had everything set as entry. Guess what? Users don't read the manual well and don't understand the impact of everything being an entry route.

I'll try and do a video of this tonight.

I suspect they had something more complex in mind, and it didn't really work. As long as the frequency is such that the detector signals are disrupted whilst not triggering the jamming protection, it is fine. It only take a few minutes of experimentation. If you want it more advanced, a tiny...

Yes - with the Yale system this is totally trivial. Buy a 434MHz AM OOK transmitter for £1. Buy a 555 timer and external components to build an oscillator. Modulate the transmitter with the 555 timer. You just need to pick a frequency that causes the basic RC AGC in the receiver to set the gain...

I just don't get this. On one thread, you are telling me vulnerabilities in alarms will never get exploited - these alarms are just an deterrent to the opportunistic thief - but you don't want these vulnerabilities made public?

Some of them have started engaging with me on issues in their systems I get contract work doing reverse engineering. Like what? It's so secret that it's not mentioned anywhere outside the elite few? If it's that secret the security is bound to be awful - secrecy, closed systems and...

There's a lot more interesting stuff I would like to post, but I'm being cautious as: a) A lot of people seem to be angry about it b) I've been threatened with legal action I find it very odd that one hand I'm being told no one will ever exploit anything I publish, but if I publish it, it's...

Ah, OK. I posted that on TSI on the 1st of May. The reason I came here was I noticed my blog was getting hits from PMs on the site, and I assume it is being passed around by PM.

What has been posted that is of such concern?

It's in the same price band as grade 2 wireless alarms like the Pyronix Enforcer and Texecom gear now, yet seems to be much less capable. I don't think consumers are aware of this. I really don't get this attitude. This was exactly how BMW reacted when they were told their transponders could...

Why have you made the assumption that the sensor hasn't sent? All you do is record the sensor activations immediately prior to the disarm signal being sent, and use them later.

So at what point does an alarm become worthless because it is so insecure? What if you could completely crash one particular alarm from outside the property within seconds? What if another alarm had a backdoor that meant that anyone could disable it remotely?

Texecom Ricochet, Pyronix Enforcer, Visonic PowerG all use licence exempt frequencies and are much more secure. What aspect of the 434/868/915MHz ISM bands stops a secure system being built? There are limitations, but it's perfectly possible to work within them. The Friedland SL series use...

I'm not saying the alarm isn't a deterrent. I am saying that the Yale 434MHz alarm and Friedland SL series are very dated and nowhere near as secure as alarms that are not much more expensive. I think they need to raise their game. I could build and sell a small device, today, that could...

By your argument, people might as well just install dummy bell boxes.

In terms of crime prevention, people weren't cloning transponders in car keys 5 years ago. They are now. People weren't removing copy protection on DVDs in 1998, they were in 1999. Locks weren't commonly snapped 10 years ago, they are now. Things change. Yale and Friedland sell alarms that...

No, none of it is speculation. I spend my time stopping alarms far more advanced than the Yale ones working. Claiming that Yale wireless sensors transmit with 300mW and you need 11kW of power to jam them is fiction. Also claiming that the anti-jam will alarm if the sensors are jammed is...

I've not claimed any of those things, why would I want to prove them?