Dialog code versus code grabbers. Code grabber: what is it, types, methods of protection Conversational code and individual data

When buying a new car, most owners often have the question of which alarm is better to install, since it is no longer a secret to anyone that most car alarms are scanned by code grabbers and it is not difficult for intruders to get into the car without any forced openings.

Recently, manufacturing or algorithmic code grabbers have become widespread. And now 90% of alarms cannot protect the car, because they use the Keeloq code to authorize the key fob. For reliable protection, it is time to use the new technology of recognizing the key (key fob) "your stranger", this is the so-called code - "Dialod".

What is a code grabber?

A code grabber is a device for intercepting a security system signal, operating within a radius of up to 150 meters. Since the device works at a long distance, this makes it invulnerable and it is impossible to understand what it is scanning.

The interception of the system signal occurs instantly, at the first request for a code from the key fob, even in the absence of the car itself. After intercepting the signal, the code grabber easily disarms, as well as arming, and the blocking to start the engine is automatically removed. The principle of operation is the same as that of the factory algorithm of the car alarm manufacturer. At the moment of signal interception, the algorithmic code grabber creates a digital analogue of the key fob and automatically saves it to the memory of the non-volatile processor. Thus, it opens alarms without creating radio interference.

This device can be freely bought via the Internet, the purchase and sale of such a device does not fall under any article, as the sellers say.

For those who are interested in security systems that are reliably protected from code grabber scanning, we have compiled a list of modern alarms created on the basis of the "dialog code"

What is a dialogue code?

The technique of the dialogue encryption code is used in the military aviation of the Russian Federation. It is not difficult to guess how effective and efficient this model is.

We suggest that you familiarize yourself with the list of car alarms with a dialogue code for protection against signal interception:

• Car alarms Stalker Dialog

All listed models are equipped with a dialogue code and are reliably protected from scanning of external devices. You can purchase and install any of the selected security systems in our company at any time convenient for you.

Technological progress does not stand still, forcing us to rejoice in new and even more useful inventions. So it is not surprising that, along with other devices, car alarms are also being improved.

Despite the functionality and convenience of the same static alarms, they are not reliable. The sent code can be read by any specialist with a code grabber.

Another thing is signaling with a dialog code, where more complex and reliable logic works.

So static alarms are becoming obsolete and almost never released today.

What types of security codes in car alarms exist?

Let's remember what kind of alarms are by type of security codes.

Here are the following options:

1. Static code management.

Devices with this code belong to the category of budget models and have the lowest price.

As already mentioned, such alarms have been discontinued due to low reliability.

The main disadvantage is the risk of intercepting the code and its subsequent use to break into the car.

2. Dynamic control code.

A feature of systems based on this principle of operation is a changing code that is generated each time the button is pressed.

Such a signal is also easy to intercept, but it is more difficult to use it for its intended purpose - it will take a lot of time not to decode the signal and then hack the car.

3. Dialog control code and signal exchange.

The main advantage of such a device is the "binding" of the alarm to a specific control unit.

In the process of signal exchange, the identification code is verified, after which the “brain” decides whether to stop or continue the exchange process.

What is a dialogue code alarm?

The dialogue code in the car security system is in some way the call signs for the car, which can only be received by the control unit and nothing else.

The driver presses a button on the key fob, after which the signals are exchanged.

If no errors are found during the dialogue, the system opens access to the car and makes it possible to start it.

Outwardly, alarms with a dialogue code are almost no different from standard systems with dynamic code.

There are only "internal" differences - the use more locks and sensors, functionality and high level reliability.

The principle of operation of such an alarm for a car

How does such protection work? The algorithm is built as follows:

1. The owner of the car presses the button to arm or disarm the car from the alarm.
2. The key fob generates a request for a specific action and sends it to the control unit.
3. Upon request, the control unit generates a numeric code (for example, 808) and sends it to the key fob.
4. The control panel receives the signal and sends the received code to reverse direction.
5. The control unit receives the previously generated code, compares it and, if the numbers match, executes the given command.

The whole process is only in words long. In fact, it takes a fraction of a second.

Thus, the dialogue code is a special password (cipher) that is generated by the control unit and sent to the remote control.

In addition to maintaining a dialogue, this alarm has another advantage - the regular change of passwords every time the car is disarmed (armed).

As a consequence, the numerical code changes all the time (is dynamic).

Popular Models

Against the backdrop of high demand for alarms with a dialogue code, the choice of models is almost limitless.

At the same time, the main selection criteria, as always, remain - price, functionality and quality.

Among the most popular options are:

1. StarLine A61 Dialog.

Affordable, easy-to-use and effective alarm with conversational code.

The main features of the device are the presence of a 2-level shock sensor, a built-in power relay, modern regime turbo timer, LED indication, possibility of using a blocking relay and compatibility with .

Main differences from competitors:

• transmission of information about the car at a distance of up to 1000 meters;
• the presence of a memory that captures the past state;
• blocking of the motor in case of dismantling. The system will wait for the installation of the original unit and only after that it will allow the power unit to start.

The alarm blocks the doors and hood, ignition and engine. There is also a shock sensor on the body part and a shock sensor in the cabin.

Specifications:

• voltage - 9-15 Volts;
• current consumption - up to 25 mA;
• 2-level sensor;
• low battery indication, etc.

The price is about 130 US dollars.

2. Stalker-600 NVB.

Powerful anti-theft system, which is based on the dialog control code.

A feature of the system is high-quality encryption of the code that no grabber can intercept.

Main features:

• noise immunity, which is important when operating the device in a city;
• automatic control of the communication channel;
• application digital bus, allowing you to program the device at your own discretion;
• the presence in the kit of a pair of key fobs, characterized by a bright screen.

Specifications:

• operating voltage - 9-15 Volts;
• operating temperature range - from -40 to +85 degrees Celsius;
• rated current consumption - up to 30 mA.

The price of the device is about 150 US dollars.

3. PANDORA alarm LX3050.

High-quality, but at the same time affordable alarm system, which is designed specifically for Lada cars.

The main features of the system:

• the presence of a blocking relay built into the system;
• personal encryption key;
• reliable protection from code interception;
• on-board network voltage control;
• autorun.

Specifications:

• operating current - up to 40 mA;
• 8 power relays;
• CAN bus support;
• voltage - 9-15 Volts.

The cost of the device is about 130 US dollars.

Discussing interactive car alarms. In the material: the principles of operation of car alarms based on a dialogue code.

Security systems for cars with dialogue codes

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The process of technical development is not on dead center, but tirelessly continues to cover new areas from year to year human activity. There is nothing surprising in the fact that security systems for cars (immobilizers, car alarms) are constantly being improved by the manufacturers themselves. The same situation is with static type signaling devices, which gained a certain percentage of popularity during the period when they had just begun to develop security means for cars. Usually the code can be read quite in a simple way, if the criminal uses a code grabber, however, in the case of a device that has a dialogue code, such a trick will not work.

It is clear that static security systems for cars are currently not are issued. For this reason, we will not discuss this type of alarm, but rather we will immediately move on to car alarms that work on the basis of a dialog code.

The dialogue type code in the car alarm is a kind of call sign vehicle, which is intended for the owner of the car. In order for the removal of a special code to be implemented (security systems), you will need to send a signal from the radio transmitter (you just have to click on the button). A signal of this kind is subject to further processing by the system, and then it will send a digital combination in a completely random way. After all this, the alarm key fob will acquire a code that has an encrypted form and send a response signal. With a complete match, the car security will be in a deactivated state. It is worth mentioning that the dialogue is implemented only when the system has a set of data about the user that was previously driven into memory. This is how the dialogue process of the owner and his vehicle is carried out.

How reliable are interactive anti-theft systems?

The connection of the dialogue (two-way) type of car and the car owner has a number of special advantages. The main advantage of these devices is privacy. Only the owner of the car has the ability to receive the signal. In addition to this fact, the combination of numbers is built in a completely random order, without any regularity, and also cannot be repeated. Therefore, guessing or calculating the encoding will not work.

Another advantage of protection devices with a dialogue system is the possibility of installing this type of signaling devices on different cars. The protection device is not tied to a specific vehicle model, to a specific type of engine.

There is only one important drawback: the user will have to make a choice of a car alarm system that has support CAN bus or with the absence of it, so this nuance depends solely on what kind of car you have.

On what dialogue principles does the protection of the radio channel work?

Two-way communication has provided several great opportunities to use new coding algorithms, which are based on a dialogue request-response system. The principles of the conversational system have managed to gain popularity at a fairly rapid pace due to the wide range of positive features that are hidden in radio reception sessions. In addition to the fact that the code is very persistent, there is also an additional advantage - the exchange of useful data during the authorization period. The next advantage of the codes of the dialog type can be quite justifiably considered that there is no need for a synchronization process for the counters. A similar procedure was carried out in without fail on a system with one-way dynamic code.

Synchronization of counters was used mainly by attackers to implement encoding substitution. Most car manufacturers have been using dialogue-type codes for a long time when creating their "four-wheeled creations". The first transition to signaling of this type was carried out back in two thousand and six. However, the requirements imposed by the service do not make it possible to speak about the absolute correctness of decisions of this kind, because any regular system must have service channel so that even the most perfect code can be bypassed.

The main feature of car alarms that have a two-way type connection is the function of transmitting certain data that is associated with the vehicle's security system to a radio transmitter. The distance over which the transmission process is carried out can be about one thousand four hundred meters. Signaling devices of a similar plan have remote controls remote control equipped with an LCD display. The radio transmitter controls the signaling device, as well as the security level of the car. Remote controls provide the user with all the information that is presented as pictograms-symbols. Dialogue-type car alarms come in various types.

Installation process dialogue systems guards with remote sensing ( remote start) engine, takes into account great amount various nuances. Even with very low temperatures car showroom will be filled warm air, the engine will be warm. The activation of the machine engine is usually done either using a key fob, being at a close distance from your car, or automatically. The user can set a timer that counts down. When the time runs out, the engine will automatically stop. The user is free to set the timer, which after a certain period of time will give a signal to automatically stop.

The implementation of the installation process of alarms for vehicles based on dialogue communication is suitable for any vehicle. They have very low level adaptability to carburetor engines, because during ignition you can approach increased speed, and pull out the choke handle.

Varieties of car alarms with a dialogue code

The signaling device Alligator S 200 has two-way communication, it has LED
key fobs, however function auto start missing here. car device to ensure the safety of the vehicle offers up to 6 protection zones, 2 chains for interlocking car engine, also a personal code and a mode that prevents car theft. The personal code is not required for use. This alarm has a silent protection mode. The system does not provide for the use of the mode anti-theft device immobilizer. There is a function of separate deactivation of the sensor areas, as well as a quick deactivation of the passive setting, memorization of 2 causes of operation. The remote control has a vibration mode.

The MongusDuplex security complex works with interactive communication, without the automatic start function. The distance at which the radio transmitter operates can be up to four hundred meters. The MongusDuplex car alarm device operates when using 5 protective zones. Also included is a personal code. The Mongus car alarm has a mode for providing an anti-theft situation according to the principle of the immobilizer. When the Mongus car alarm is being installed, it is possible to activate the “freehands” function using the auxiliary unit.

Back in the early 2000s, alarmed car owners felt like they were in God's bosom, and few could believe that their car could be stolen. But more than ten years have passed, technological progress has taken a significant step forward, and now, unfortunately, the possibility of losing a car, even equipped with a good alarm system, is quite real. Moreover, some intruders will need only a few seconds to crack a car alarm. You left the car, for example, to have a cup of coffee before work, you come back, but you can’t see the car. There was no alarm, no people shouting about the fact that the car was brazenly broken into in broad daylight.

Modern systems car alarm, integrated into cars, for the most part, have good protection against hacking, but still there are many vulnerabilities in the remote start system of the car - in locks, in the tracking system and other security elements of the vehicle.

It's not surprising when some computer genius can visually show how to bypass the alarm, unlock the car and start the engine. Even automotive applications installed on the owner's smartphone are potential targets in many cases. On the territory of our country, many scammers use special electronic devices to open cars for the purpose of their subsequent theft.

These "super gadgets" mimic the same signals as the key fobs that many motorists have. In this article, we will talk about how scammers manage to hack a car alarm, which models are more protected from such hacking, and, most importantly, how to protect your car from theft in this way.

What is a code grabber?

Shortly after the appearance of scanners in the hands of intruders, another device for hacking car alarms appeared - code grabbers. They work on the principle of intercepting the alarm control code that occurs on the air after pressing a button on the key fob. This gadget simply copies this signal and records it, and then it will need to be played back by pressing the corresponding button, and the car doors will open.

But not all car alarms use identical codes for opening and closing doors. In this case, the attacker simply keeps track of the driver's actions with the alarm for longer, recording all the codes. With the data collected, the scammer's hands are completely free, and he can steal a car at any time and almost anywhere.

Over time, code grabbers have evolved technologically. To date, using these devices, you can analyze and record up to hundreds of broadcast messages from.

Unfortunately, for a hijacker with a grabber, the task of breaking into a security system with a static code becomes absolutely not a problem. These devices are both mass-produced and do-it-yourself. These are real portable analytical centers, including a highly sensitive receiver, a computer and a transmitter with a frequency linker that has a flexible tuning system.

Additionally, code grabbers are equipped with an antenna, with which you can manipulate broadcast messages not only near the car, but also at distances within its visibility. The dynamic change algorithm may already be known to the program or recognized by the grabber. Next, the next message and its on-air output are projected. In addition to these features, code grabbers can set up barriers so that the fraudster can gain more time to analyze information from dynamic key fob codes.

Algorithmic

Algorithmic-type code grabbers with manufactory decryption codes can open most of the currently known car alarms that work without the use of conversational coding or regular car key fobs. These devices are freely available on the Internet, since, according to the sellers, they do not fall under any legislative article, and there is no punishment for such devices. Their cost varies from $500 to $2000 depending on how many types of alarms it can open.

To take full control of the security system, the algorithmic grabber code intercepts a single radio packet from the security console, even without the presence of the car alarm itself. After intercepting the radio packet from the key fob, the algorithmic code grabber virtualizes security console control and writes it to the internal EEPROM of the processor.

Further, by pressing one button of such a gadget, the attacker launches a virtual remote control that controls the alarm system and breaks the car’s security in a few seconds. Code grabbers are able to break into many car security systems. This list so exhaustive that we felt it necessary to list alarms that are not affected by the code grabber:Pandora series DeLuxe, Prizrak, DXL, Starline, Stalker, Magic Systems, Mega Gold, Magnum.

Substitute

The key fob of the security system sends it a signal consisting of two parts: open and encrypted. The open signal sends a unique key fob number and indicates which button was pressed. The number of pressing is hidden in the encrypted signal. This number increases after each press of any button on the key fob. Thus, the dynamism of the code is ensured.

The security system receives a signal, checks if this key fob is familiar. If the outcome is positive, the second part of the signal message is decoded. Further, the alarm determines the number of pressing: it is less than the last one or more. If less, then this pressing has already been worked out, and it is ignored. If a little more, then this is a necessary command, and it must be processed. A command is information about which button was pressed. The key fob works unilaterally, only for sending.

It sends information about the pressed button, and then the security system decides how to respond to it. Therefore, one key fob can be used for one-button and two-button arming and disarming systems.

The replacement grabber intercepts the signal sent by the key fob and converts it on the air so that the alarm does not receive the message. In this case, the original signal is stored in the grabber's memory. Next, the next signal is intercepted and replaced by the first saved send. The substitution takes place in a hundredth of a second, so the owner does not notice it. The car is guarded, the careless owner goes about his business, not noticing that the button worked only the second time. The alarm has been disarmed.

How to protect yourself?

The most easily hackable are alarms, which are already installed by default in factories. The vast majority of them work on standard code, which can be quickly intercepted, having necessary devices. You do not need to save on the security systems of your car, because intruders will immediately take advantage of this.

The easiest way to improve a stock car alarm is to flash it. You will have to spend some money, but you will receive exclusive code signals that are much less susceptible to interception by grabbers. good option there will be installation dialogue car alarm with feedback. Even if a fraudster intercepts the signal and steals a car, the route of his movement will come to you in the form of SMS informing.

GPS monitoring along with alarms is very popular. This system will cost a pretty penny, as it is an expensive purchase, installation, plus a monthly maintenance fee. All system components are perfectly hidden in the car, so it will be difficult for the thief to eliminate them, and the owner will send a message so that the engine cannot be started.

No matter what method of protecting your car is chosen in terms of investment, you will feel safe and calm. But do not be completely careless, knowing that, for example, you have the latest generation of alarms installed from famous brand– do not leave the car unattended and keep it only in guarded parking lots. Also, take your valuables with you.

Recently, we have been hearing more and more often that the command sent by the alarm key fob can be intercepted. special device- the so-called code grabber or scanner, and then disarm the car without the owner noticing. How do modern systems counter this?

Let's start with the fact that code grabbers appeared in the last century, almost simultaneously with the first electronic security systems. Then a fixed code was used, which was incredibly difficult to pick up at that level of technology. But an unchanging code is easy to enter into the memory of a special radio receiver (code grabber) - it is enough to appear once near the "native" key fob at the time of arming or disarming. And play the command. of course, already in the absence of the owner.

As a response, a dynamic code appeared, which, with each sending, changed according to a special algorithm embedded in the memory of the key fob and alarm. Therefore, the reproduction of the once recorded code could no longer help the hijackers. But they didn't stand still. We will not go into the mathematical subtleties of decryption, we only note that by writing down several commands sequentially transmitted from one key fob, we can decrypt the algorithm for forming the "secret" part dynamic code- it is the matter of time.

To date (and for a long time to come), full-fledged protection against electronic hacking is provided only by a conversational code with individual encryption keys. The system, having received a dynamically encoded command ("password"), does not execute it immediately, but sends a confirmation request - a random number, also dynamically encoded. The keychain accepts it and with the help secret key and complex algorithm generates a "feedback", again dynamically recodes and sends to the system. If the feedback is correct, then the system executes the command, and the process takes a fraction of a second. Unlike a keychain, a code grabber in the hands of even the most seasoned hijacker does not know the algorithm for changing the code, the encryption key and is not able to generate a response in the allotted time. But even these measures are not the limit of protection.

Dialog Code Features, implemented in StarLine alarms and immobilizers, guarantee absolute protection against hacking using any known code grabbers. Each system uses an individual encryption key, transmitted only once when registering a key fob in the system. The key length is 128 bits, which gives 3.4*1038 combinations. Even if you sort through billions of options per second, it will take more time than the universe exists to solve the problem. It is impossible to solve this problem "In the forehead" with the existing computing facilities.

When generating feedback in the dialog code, a hardware random number generator was used, which additionally protects against code hacking. In addition, the transmission of information packets is accompanied by short pauses, and the operating frequency of transmission within the authorization cycle changes abruptly. These measures make it difficult to both intercept and decrypt the command - despite the fact that the selection of an individual key is generally impossible. In short, Koshchei's death is a vigle, a needle in an egg, an egg in a duck, a duck in a hare, a hare in a chest, a chest on an oak tree...
StarLine is so confident in its brainchild that it officially offers all specialists in the field of cryptographic strength research a long-term contract in the amount of 5,000,000 rubles - let them try to Hack!