State-of-the-art listening system for GSM phones

[Объединенное Детективное Бюро]

“Devil from a mobile phone” “Devil from a mobile phone” makes the right to privacy an illusion Mobile phones are a kind of spy. Here are photos using MMS, and viruses, and microchips that establish our location and record who we are talking to. Technical innovations escape the control of users and turn their right to privacy into smoke, Panorama writes in a material published by Inopressa.Ru. Jack Lee Woo is a 20-year-old American who has possessed an unbridled passion for ladies' panties. The passion was so strong that a few days ago in one of Seattle's shops he put a camera phone under the skirt of a pretty young lady. And took a picture. Result: she sued him, and Jack risks being in prison for five years. One of the employees of the Italian company was fired without warning on charges of "violation of the obligation to remain loyal to the enterprise." The employee was taken aback when, using a new mobile phone, he re-shot the list of customers, and then transferred it to competitors. Now the stars have no peace. At Madrid Airport, Maria Grazia Cucinotta was the victim of a persistent paparazzi. "I didn’t eat anything in the morning, therefore, with a tired face after a hard day's work, I eagerly supported myself with a bun. Quite by chance I noticed a young man who pretended to be talking on the phone, but in fact he took pictures of me, sending pictures to nobody knows. He she didn’t even ask me for permission. Uncivilized behavior, "she said. Photos, movies, spam, displayed on the display. Location Services. Unauthorized access by minors to the Internet. And even industrial espionage. There is no doubt: the beloved and hated mobile phone, which is more and more like GPS, is increasingly turning into a microspy and has an irresistible tendency to transform into Big Brother. Or in the Big Spy. “Due to the poor quality of the images, I haven’t bought a single sensational photo taken with my mobile phone yet,” says Bice Biyaji, director of the Novella 2000 weekly news weekly. “But this is only a matter of time: with the technical improvement of the integrated cameras, all our readers may turn into exclusive hunters. " From Big Brother to a “bad teacher” is one step, many concerned say, including child protection organizations. “In addition to exchanging pictures on a mobile phone, pedophiles can get to the point of giving children phones and persuading them to take pictures of themselves and their friends,” said Vernon Jones, a Danish representative for Save the Children. This organization plans to launch a campaign to clarify the dangers posed by mobile phones in the near future. Mobile phones are scolded by psychoanalysts. Messages that come to the display, calls, signals, SMS, MMS only increase the individual's pathological need to be in constant ongoing contact with the outside world. “They reduce the ability to be alone with oneself, and also reduce the ability to think,” argues Luciano De Grigorio, a psychologist and author of the recently published work Cell Phone Psychopathology. This item is with us throughout the day, and inside it may be an eavesdropping microchip. Thus, a cell phone can turn into a Trojan horse of our privacy, into an antenna that can spy on everyone, from his wife to the boss. It’s enough to type the words “mobile phone” in any search engine to see the many sites that sell devices for intercepting other people's conversations. These spyphones can be up to ten times more expensive than regular cell phones, because they have built-in chips that turn into micro-spies, as they are powered from a distance. It is enough to call this phone from a number that was previously entered into the microprocessor's memory to start listening, while the owner of such a device does not even suspect what is happening: the cell phone spy does not ring, does not vibrate, the display does not light up. Like computers, cell phones can become infected with viruses that can "infect" almost all mobile phones. “These viruses are sent via SMS,” said Lt. Col. Umberto Rapetto, one of the leaders of the technology guard’s anti-crime team. “They contain codes that send commands to the phone that receives them.” They can order the phone to dial some number or send SMS to all network subscribers: in any case, economic damage is caused to the owner of the phone infected with the virus. Umberto Rapetto warns that you can install a device on your phone that allows you to duplicate calls: when you receive a call to the phone of interest, you can find out who it came from and even listen to the whole conversation. All of these devices, recalls the lieutenant colonel of the financial guard, are illegal. But they are available to anyone who is willing to pay several thousand euros for such a high-tech toy. Source: NEWSru.com

 

[Объединенное Детективное Бюро]

The whole world as the Big Ear We all love to discuss the subject of wiretapping. The probability of wiretapping puts pressure on citizens and modifies their behavior. When you say, "This is not a telephone conversation," we all love to discuss the subject of wiretapping. The probability of wiretapping puts pressure on citizens and modifies their behavior. When you say, “This is not a telephone conversation,” who do you fear? The weekly New Russian Word (Europe-CIS) does not advise loudly answering this question. By saying something like this, you automatically leave the community of law-abiding citizens and go into the category of suspicious people who have something to hide. And if so, then why not listen to you? Each time a topic arises of electronic surveillance of a noble tribe of taxpayers, it is accompanied by an attempt to raise the subject under discussion to civilian and moral heights. And raise it. To the cosmos. There - "Echelon", or rather, the orbital component of the global surveillance system, which is exploited by intelligence agencies in the United States, Britain, Canada, Australia and New Zealand. Until May 2001, a whole commission of European parliamentarians fought over the riddle of the Echelon, but it only crashed, having come to the conclusion that the Echelon exists and nothing can be done about it. Just at this time in Russia a completely national scandal developed around SORM - the System of operational-search measures on telecommunication networks. SORM combes the air in the automatic search for keywords, for example, "bomb". This is not a "Train", of course, the pipe is lower and the smoke is thinner, but from the point of view of the constitutional rights of the SORM it is exactly the same byak. The progressive world community has learned and acknowledged that with electronic surveillance it will continue to be so, and not otherwise. We also respect in silence the constitutional rights of citizens to privacy, personal and family secrets, the secrecy of correspondence, telephone conversations, mail, telegraph and other messages, as well as protection from the collection, storage, use and dissemination of information about a person’s private life.

 

[Матушкин Андрей Николаевич]

Thank.

 

[VIPINTERNETSPY]

Hello! How much does such a system cost and is it possible to buy it?

 

[Матушкин Андрей Николаевич]

Hello. We do not sell these products. https://www.objavleniya.ru/advertisement ... ind / 31633 /

 

[Матушкин Андрей Николаевич]

Re: Software for mobile phones. Myth or Reality? https://www.objavleniya.ru/advertisement ... ind / 31633 /

 

[Бедеров Игорь Сергеевич]

Re: "Bugs" from "sims" Actually, if necessary, any cell phone can be easily remade under a bug. The sound and the backlight turned off, stuck the headset, turned on the automatic answer to an incoming call. That's all. Place the microphone in a convenient place. Optionally add a beacon service to determine an approximate location. The crime is not to make such a device, but in the way it is used.

 

[Матушкин Андрей Николаевич]

Re: "Bugs" from "sims" Mabus, you are absolutely right! Who are you, please introduce yourself. Sincerely, Matushkin Andrey.

 

[Детективное агентство. Украина. Харьков. Львов.]

Protection of negotiations

Before proceeding with the choice of methods and means of protection, it is necessary to decide who will have to defend oneself, what capabilities and, most importantly, the intended opponent has means.

Methods of information retrieval may include direct connection to the channel at the telephone exchange with recording of conversations to the tape recorder, or removal of the signal from the line by contact or non-contact methods, followed by its transmission over the air to the customer. All this requires certain costs, therefore, in order to choose methods and means of protection, it is necessary to really assess the capabilities of the eavesdropper. It is expensive, ungrateful, and practically impossible to control unauthorized access to the line between subscribers, therefore it is simply impossible to ensure complete security of negotiations without the use of special protection devices. These devices work on the principle of converting the speech signal coming into the line beyond recognition and are usually made in the form of telephones, or in the form of prefixes to them. Having passed the entire line in an altered (protected) form, the signal reaches the subscriber, where it is converted into recognizable speech. In this case, the listening methods simply turn out to be ineffective, although you have to purchase the appropriate equipment for each subscriber with whom you need to conduct confidential negotiations. As a rule, these devices work in open mode with any subscribers equipped with ordinary phones.

There are two approaches to protecting negotiations, based on the transmission of a speech signal over a channel in analog or digital form using a modem. As a rule, in each of the approaches for protection, encryption is used, which determines the dynamics of speech transformations in the first case, and the direct protection of the digital stream in the channel in the second. From the point of view of protective properties, equipment that uses signal transmission in analog form belongs to the class of temporary resistance, and using digital transmission - to the class of guaranteed resistance.

All kinds of scramblers and maskers, which use frequency-time transformations of the speech signal, are used to protect equipment of temporary stability. The approaches for their decryption are based on the existing long-term correlation properties of the parameters of the speech signal, which make it possible to restore the original signal from the encrypted one by automatic and semi-automatic methods. Figure 1 a, b shows sonograms (time-frequency representations) of the original and encrypted speech signal for typical scrambler transformations. From Figure 1b, it becomes clear that the keyless decryption process resembles collecting a picture in children's blocks and naturally no one can guarantee that it will not be completed successfully.

Equipment of guaranteed durability, using the transmission of a speech signal over a channel in digital form, is often called vocoders - from the English "voice coder". The amount of information required for a high-quality digital representation of speech corresponds to a transmission speed of about 64 Kbps, so pre-compression of speech to represent it in the range of 2400-9600 bps is a mandatory component of vocoders, which corresponds to the real transmission speeds of switched channels through a public telephone network . The sonogram of the protected signal in the communication channel during digital transmission using a modem with the V.34 protocol is shown in Fig. 1c. The signal in the channel is noise in nature, and when using strong encoders, respectively, it has guaranteed decryption resistance.

One of the characteristics of negotiation protection equipment is the quality of speech achieved after classified conversions. The quality of speech in scramblers depends on the complexity of the transformations themselves, as well as on the characteristics of the communication channel. With a good channel, the speaker remains recognizable in scramblers and syllabic intelligibility of more than 90% is ensured. The quality rating of many scramblers, obtained on the basis of the method of opinions on a five-point scale, lies between 3 and 4.5. With a poor channel, intelligibility and speech quality after scramblers deteriorate sharply.

Speech quality in digital conversions depends on the applied speech compression algorithms and on the speed of its transmission over the communication channel. When using algorithms based on analysis through synthesis such as CELP at 4800 and 9600 bps, the quality is comparable to the quality of speech in a regular telephone channel (syllabic intelligibility 92-96% and assessment by opinion method - 4-4.5). At 2400 bps when using linear prediction algorithms such as LPC-10 with optimization of the excitation signal, syllabic intelligibility is about 86%, and the quality rating is about 3.5 points. A feature of digital speech transmission is that the signal quality does not change during the passage of a communication channel, because the modem is fighting interference. Moreover, in practice, with a high level of subscriber line attenuation, speech quality when using vocoder systems in protected mode has been repeatedly recognized as higher than with conventional telephone communications.

Despite the many different characteristics of the equipment for protecting negotiations, the choice of its specific type is based on the degree of security that it provides and the value of the information to be protected. Moreover, there is a rule according to which the cost of protection should not exceed losses from a possible loss of information.

Devices for protecting cell phone conversations.
Scrambler

Scrambler is a device that encrypts speech transmitted over communication channels. This, of course, is not about the cryptography used in cellular networks, but about really reliable protection. The scrambler attaches directly to the phone and in the off state does not manifest itself. But once the owner of the device turns it on, he immediately begins to receive all signals coming from the microphone, encrypt them, and only then send it to the output. Speech decoding occurs in the reverse order. Signals from the antenna are fed to the scrambler, and from there to the speaker.
The main advantage of scramblers is the high reliability of protection. Modern devices implement cryptographic algorithms that meet all the requirements. In addition, scramblers allow you to protect yourself from any method of listening to cell phones, including special equipment installed by the operator. Unfortunately, this technology also has disadvantages. And the most important of them is the need for both subscribers to have compatible devices for conducting private conversations. And given the number of companies working in this area, it becomes clear that in order to protect conversations, people will have to agree in advance on the choice of a particular development. Naturally, this significantly reduces the area of use of scramblers: no one will buy an expensive device for one or two calls. So scramblers will be primarily useful to business people who are constantly negotiating with each other, that is, business partners or top managers of a company.
To date, the market has a lot of scramblers for cell phones. It is noteworthy that the price of them varies in a very wide range - from 500 to 2000 dollars. However, if you look closely, such a spread becomes quite understandable. The cost depends on the reliability implemented in the protection device. The cheapest devices use simple encryption algorithms that can be cracked using special equipment. In addition, their developers often do not even report what technologies they used in their products and what their characteristics are. However, if special services, large criminal groups or large companies are not interested in your negotiations, then a scrambler from this group will be quite enough for protection.
More expensive devices use good algorithms, but with a key length that is currently insufficient (128 bits). Well, if a person needs really reliable protection, then he will have to turn his attention to devices that meet the most modern requirements and have been certified by the relevant authorities. True, for every device that satisfies these conditions, you will have to pay at least $ 1800.

Cryptophone

Cryptophones appeared on sale recently. They are ordinary smartphones with additional software. Only one of these devices is available to the Russians, which is the development of the German company Cryptophone. In principle, the essence of the cryptophone is no different from the principle of operation of scramblers. Similarly, microphone signals are digitized, encoded and sent to the cellular network in encrypted form. All the difference lies in the way this technology is implemented.
The main advantage of the German cryptophone is that during its development two widely known encryption algorithms were used: Advanced Encryption Standard (AES) and Twofish, both with 256-bit keys distributed over the Diffie-Hellman system (with its own key length of 4096 bits). All this indicates the exceptional reliability of protection installed by this device. In addition, representatives of Cryptophone emphasize the fact that their company is an exclusively commercial organization and does not have any ties with government agencies. So their clients can not be afraid that the special services will have some kind of “bookmarks” that make it easy to listen to conversations that are conducted using cryptophones. In Germany, the appearance of this device provoked even serious discussions about whether it is worthwhile to permit the free sale of devices that allow uncontrolled negotiations.
In general, people who need a truly secure connection can very well turn their attention to cryptophones. The German company sells them through its online store and promises to send them to any country in the world. True, this pleasure is very, very expensive. A set of two cryptophones will cost the buyer about 3,500 euros. True, for this money he will receive not only a secure connection, but also a handheld computer, which can serve as a translator and organizer, on which you can play and create documents. However, few people need all these features. Most will prefer a relatively large smartphone miniature cell phone, which is much more convenient to use. So in this regard, scramblers are preferable. Moreover, they allow you to make secure calls not only to mobile phones, but also to ordinary, landline phones (unless, of course, the latter are equipped with scramblers of the same manufacturer).

The Maskrator

Speech maskers work on a completely different principle than scramblers and cryptophones. In fact, this technology is designed for landline phones, it is to them that the devices themselves are connected. But they allow you to protect all conversations in which these devices and any other, including cellular, subscribers are involved. It happens as follows. After activating the protection, the maskrator delivers a specially generated noise to the line that spreads throughout the communication channel. Thus, an attacker trying to listen to a conversation will receive only a random set of sounds. Well, the maskrator "knows" the characteristics of the interference it creates. And he imposes a special filter on the signals, which compensates for the noise, isolating the subscriber’s speech from them.
However, this type of device has its drawbacks. The thing is that these devices can only install one-way protection. After all, there is no jammer on the cell phone. And this means that you need to send normal, “noisy” signals to it, which attackers can intercept. So, only the subscriber’s speech with a cell phone turns out to be closed to listening, while the replicas of the owner of the stationary device with the installed protection are unprotected. This, of course, is a very big minus of the technology under consideration. However, this disadvantage can be compensated by the ability to conduct secure conversations with all people, regardless of the type of their phones and without the need to install protective equipment for subscribers.
The spread in prices of speech masking devices from various manufacturers is quite large. For the cheapest devices, buyers will have to pay only 100 - 150 dollars. Such devices use randomly generated noises. In principle, they can be decrypted, although this requires special technical means and serious knowledge. Other masking machines cost between $ 700 and $ 800. They use speech-like noises to protect the semantic signal. Thus, the analysis of intercepted traffic becomes almost impossible. Speech maskers are quite attractive devices for many companies. Indeed, in order to receive closed messages from any, including cellular, subscribers, it is necessary to establish protection on only one office phone. True, they cannot help in conducting business negotiations, since in this case one of the parties is unlikely to be able to use only meaningless phrases in the conversation.

Encryptor of telephone communication channels, fax "PRAGMA"

Guaranteed cryptographic protection of telephone communication channels, fax, PC

Autonomous power, enhanced key system - 1024bit, the ability to quickly change the master key by the user. Autonomous food. The ability to build a confidential communication in the place you need.

Optimized for operation on “distant” communication channels (international, satellite).
Characteristics
symmetric encryption according to GOST 28147-89
speech conversion algorithm - CELP 4800 baud
-protection of facsimile documents by encrypting the transmitted image, a “header” is added to the protected facsimile document, the appearance of which can be set by the user himself.
-protection of fax documents occurs automatically, without requiring user intervention
-protection of inter-computer data exchange
-Diffie-Hellman public key distribution system (1024 bits) creates a unique key for each communication session and eliminates the need for user to enter session keys
- an authentication system has been introduced, which excludes the possibility of intervention by a “third” party (attacks of the form “man in the middle”), even if such a device is present. This is solved by the use of algorithms “secure negotiation of key agreement"
- It is possible to change the key and other parameters of the device by the user
-for the convenience of users: if it is necessary to quickly change key parameters, a key injector is provided that allows you to change the key parameters of the device. At the same time, the integrity of key parameters is checked, which prevents the unauthorized imposition of key system parameters
- excluded the possibility of the manufacturer of the device on the protection system organized by the user

 

[Матушкин Андрей Николаевич]

Re: Protection of negotiations Thank you!