![]() There is an $11 device that you can buy on Ebay that can get the number for you. Getting that key card number is actually much easier than it should be. To hack most access control systems and gain unauthorized access, all you need to do is get this number. When you walk up to the bouncer (the reader), he is going to check the list ( the access control system) to make sure that your name appears before he let’s you in. ![]() Imagine that number is a name on a list for a party. The hard coded card number that lives on the integrated circuit is the key here. With a basic understanding of radio technology and card formats, most office proximity cards can be hacked. The transmission of the card number happens in the clear - it is not encrypted. The integrated circuit outputs the card number to the coil which transmits it to the reader. The coil charges a capacitor and, in turn, powers an integrated circuit. When a card is presented to the reader, the reader’s electrical field excites a coil in the card. No hard feelings.Ĭards use a simple LC circuit. Nerd Alert! Skip if you simply just don’t care about the details. So what exactly is a proximity card? Let’s take a look inside!Ī prox card can basically be divided into three components: a coil, a capacitor, and an integrated circuit. Proximity cards use 125 kHz radio frequency fields to communicate when in close “proximity” to a reader, hence the name. Because there are many different types of card technology today, we will refer to the vulnerable type of cards as “proximity cards.” So if someone wants to clone an rfid key card, it’s not actually hard thing to do. If you think that these cards are “safe” or “secure” or “impossible to hack,” you would be wrong. Yes, the white card you were assigned when you started working in an office building. One of the most commonly used technologies in the security industry is easier and cheaper to clone than you would ever imagine. Please do not use the following information on how to clone an rfid key card to exploit someone else’s security system or to try to gain access to unauthorized facilities. We are able to do this by educating the public on security threats and possible vulnerabilities.
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