I don;t think modern keyfobs use a fixed code which can be captured. AIUI each time you use the fob it rolls over to a new code which is created by applying a complex algorithm to the previous code. http://ww1.microchip.com/downloads/en/AppNotes/00001683A.pdf __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb *Sent from my etch-a-sketch* On 9 July 2018 at 13:44, Timmothy Relerford wrote: > > All, > > It seems to me the only way the key fob is going to be able to be > copied is if someone presses one of the > buttons to transmit the signal. If it is just sitting on a table or > hanging on a wall hook, how would > someone outside the home (or bldg.) cause the key fob to transmit? As > far as I know, key fobs are not > receivers. They're only transmitters. So unless I'm missing > something, I think the whole idea of > copying the code from a key fob is a load of bull. > Now, if someone were near their car and they were to press a button, I > could see where someone could > capture the code, and possible use it for malicious purposes. But > copying it outside the home or bldg. > while just sitting there, I don't think so. > If someone know that this happens, please explain it to me so I too can > understand. > > Regards, > > Jim > > > -------- Original Message -------- > > Subject: [EE]:: Wrapping key-FOBs in tinfoil > > From: RussellMc > > Date: Mon, July 09, 2018 6:21 am > > To: "Microcontroller discussion list - Public." > > > > > > Comments on this article are invited. > > I have already written a response on this article to a friend but will > > withhold posting it for a while to see what others say. > > > > In this article a number of senior security experts are reported to > > recommend wrapping car electronic key fobs* with tinfoil when carried > daily > > and maybe storing in a metal can at home. > > The aim is to create a Faraday cage to foil (groan) "cyber-thieves' " > > attempts to copy the unlock codes. > > (* ie 'keys' with wireless unlocking capabilities ) > > > > https://www.stuff.co.nz/motoring/105333168/why-you- > > might-want-to-wrap-your-car-key-in-foil > > > > > > Russell > > > > ________________________ > > > > Cited experts include: > > > > > Holly Hubert, who retired in 2017 from the FBI in Buffalo, New York. > > Now, CEO of GlobalSecurityIQ, > > > > > Moshe Shlisel, CEO of GuardKnox Cyber Technologies and a veteran of t= he > > Israeli Air Force who helped develop cyber protection for fighter jets > and > > missile defense systems. > > ... "The credit card holders don't work because they're essentially a > net > > rather than a wall." ... > > He visited Detroit recently to meet with carmakers. He's already workin= g > > with Daimler on Mercedes-Benz vehicles and the Volkswagen Group on > Porsche, > > Audi and Volkswagen products to protect them from hackers. Other client= s > > and potential clients have asked to remain confidential. > > > > Shlisel says: "The best thing you can do is keep your key in a small ti= n > > can wrapped with aluminum foil. But in a purse or pocket, just aluminum > > foil will do the job." > > > > > Unspecified: Cybersecurity experts say privately that anyone who know= s > > anything about the ease of auto and personal data hacking practices saf= e > > fob storage. > > > > > Clifford Neuman, director of the USC Center for Computer Systems > Security > > in Los Angeles, points to the millions of consumers who now carry their > > credit cards in a protective pocket designed to work as a Faraday cage. > > > > > Unspecified: People who store their fobs in Faraday cages aren't > > paranoid, experts say. > > > > > Faye Francy, executive director of the nonprofit Automotive Informati= on > > Sharing and Analysis Center, which specialises in cybersecurity > strategies. > > "Automakers are starting to implement security features in every stage = of > > design and manufacturing. This includes the key fob." > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .