With the development of technologies, criminals increasingly began to use all sorts of electronic devices in their activities, which allow you to deactivate the security complex or immobilizer. The most common device is a code brebber, which is intended for deception of automotive alarm. How such a device works and is there a way to protect yourself from the hijacking - read further in the article.

What is CodGerman

Many computer users know what "Grabber" is. This is a program whose task is to collect information from different sites in order to further place them on other resources. In other words, this is the "Thief" program. However, with the development of the automotive industry, when modern cars began to resemble computers on wheels, with such a concept as "Grabber" had to face many motorists.

Initially, Codebrob drives had a fairly peaceful purpose - they were used in the service services to unlock the automotive alarm in the event that it refused. However, the criminal world found a different destination with this device.

Using Codebrbers, attackers are intercepting the code signal that is sent from the car owner keyfob during the production of the car to protect. This code is remembered by the CodeBravel and in the required time is used to penetrate into the vehicle.

It is worth noting that almost every budget alarm presented in the modern market is powerless in front of the codebrubra. The radius of the action of this device is capable of reaching 150 meters, and calculate the attacker, which is trying to illegally consider the signaling code of a foreign car, is actually impossible.

Principle of operation Codograbbrabov

Often, all "communication" between the central alarm unit and the radio cell is one-sided connection: the keychain creates an encrypted command, and the alarm, decrypting it and recognizing the faithful certainly performs it. In this regard, modern auto alarms with feedback actually do not differ from the old "Owls", in which, after executing the command, the package is received by the package with status information, however, for the functioning of the block itself, this package is absolutely not important.

As a clear analogy, we give an example: in order to hide the content of your conversation from colleagues at work, two employees begin to speak in the language of Eskimos - their conversation for strangers will look like a random set of sounds. Codegrabera is a device intercepting a code parcel from the ether and using the acquaintance of the encryption protocol vulnerability receives its key. In the example above, the third employee, realizing that the conversation was conducted in Eskimosky, takes the dictionary and can understand the meaning of his colleagues conversation.

After that, each team formed by the CodeBravel is perceived by car alarm as valid: that there would be no advertising on "complicated encryption" and "dynamic keys", any one-sided protocol is reliable only first time after its entry into the market until it is hacked. Then there is a new generation of t. N. Manufacture Codograbra, i.e. not homemade devices, and serially produced. At the same time, they are often manufactured by reprogramming a regular keyfob from the same car alarm. For example, the manufactory code for SHER-KHAN auto alarms in 2012-2013 was made from the main radio alarm range of Logicar 1 and cost about 40 thousand rubles. - Yes, the 24th has long become the area of \u200b\u200bthe full-fledged industry, although illegal.

Varieties of Codograbra

There are several of the most common varieties of codegbers:

• Codegrabrokers for car alarms applying static code (the cheapest and simple security systems).
• Codegrabrokers that use code-substitution when working. The device is equipped with an interference generator, which is shuffling the code, which is sent from the "native" radio, and replaces it to its one. Therefore, if the alarm does not turn on when you first press the button, and it worked only with further pressures, it is necessary to alert. It is possible that Grabber worked.
• Algorithmic Codegrabber. The device can cope even with reliable alarms that use the dialog scheme in operation.

Then why such alarms are issued so far?

As for budgetary alarms, in this case no one guarantees protection against hijacking - primitive encryption algorithms, rather, are needed to screen out commands from a slant radiation. If we talk about the average segment of the alarm market, then create a crypto-resistant protocol and implement it in real electronics - a complex task that requires serious time costs of circuitry and programmers.

The bottom line is that the computing resource of both the central block of alarm and its radio tapes is strongly limited - the powerful the controller is used, the more energy it needs. Solving the task of directly, we will receive alarm that will land the vehicle battery and constantly carry the batteries in the key chain - but it will be more difficult to sell it, rather than economical, but vulnerable to Codebrber. Or we will spend too much time for encryption-decryption: car alarm will be responding with a tangible delay to the radio commands, which, by the way, have recently demonstrated almost all dialogue alarms.

Alarm with dialog code

Actually, the dialog code and is a solution that makes it useless to use traditional codegrabra. Communication in this protocol is already in both directions: first the radio transmits the command to the alarm unit command, and then the car alarm transmits the encoded task to the keychain, which it must decide, and transfer the answer to the central unit. If the task is to be solved correctly, the command will be executed.

Other solutions to counteraction Codegrabber

The easiest solution to opposition is to change the frequency range of the communication channel - modern alarms instead of the generally accepted channel 433 MHz can use frequencies to 2.4 GHz. Recently, the popularity of the system is gaining popularity in which they generally abandoned the long-distance radio tapes - for communication, the cellular channel is used or the radiometer wearable is not considered - they cannot be considered remotely.

Mechanical devices for protecting auto from theft

Modern mechanical means of protection against hijacking are trockers of pedals, steering systems or gearboxes. Even if the hijackers can open the vehicle using CodeGrubber, then for the removal of mechanical anti-theft protection, at least an additional time will be required. And given the fact that the account for the hijacker goes for a second, it is likely that it will not spend time on hacking such a mechanical system.

Immobilizers

This is also one of the common ways to protect the car from Codograbber. The immobilizer opens one of the electrical circuits that the ignition is powered, a fuel pump or starter. The machine is blocked and unlocked only by a special key chain or key. There are immobilizers that allow the car unauthorizedly, and the blocking is turned on only after some time together with the sound of alarm. This is done so that the hijacker does not have time to neutralize the device.