Recently, they have been widely used. These devices act as a pass system, allowing only those with the appropriate key to enter the house. There are times when the key is forgotten at home, lost, or simply fails. Naturally, the question arises of how to get into the house in this case.
There are many ways to open a door using special codes or universal keys. Despite the fact that there are such methods of opening doors, many users are interested in whether it is possible to open the intercom with a telephone.
It turns out that such a possibility really exists and it is realized through a special technology called NFC. Below we will consider the main aspects of this wireless technology and under what conditions it is possible to open an intercom using NFC.
What is NFC technology
NFC is a wireless technology that allows contact between two devices. NFC is a continuation of the well-known RFID contactless data exchange technology.
The difference is that RFID tags can be read from a distance of several meters, while NFC tags can only be read from a distance of no more than 10 cm.
When transmitting data using this technology, an initiator and a passive module are used. The device generates a magnetic field that affects the passive network by transmitting data.
For data transmission using NFC technology, special coding is used, which differs in the modulation index, which depends on the value of the data exchange rate. It is important that NFC devices can support two processes in parallel - transmit and receive data.
Due to this, such devices can monitor the magnetic field and detect contradictions if the received signal does not correspond to the required parameters. Such capabilities of NFC technology are actively used to conduct contactless reading of important information in various systems.
Three can be distinguished as the main ones:
- Emulation of cards and other access elements for contactless identification of an object. This method is actively used to emulate plastic cards on a smartphone, which allows contactless payments using your phone. The data read from the phone is not stored in its memory, but in a special chip, which is supported by the phone system. To be able to emulate the card, the phone must support NFC technology. In addition to emulating cards, this technology allows you to copy the key from the intercom to the NFC phone and use it to open the intercom locks.
- The second area of using NFC technology involves the use of devices in the form of scanners of the corresponding NFC tags, which will allow access to various data. Recently, this kind of labels have been intensively used instead of conventional barcodes.
- The third use case for NFC technology is called Peer-to-Peer. It provides the ability to exchange data between two devices. For example, you can support wireless communication between two devices that have NFC tags.
Is it possible to open the intercom using a smartphone with NFC
To look for an opportunity how to open an intercom using a phone, it is important to figure out whether such a possibility exists technically. First, it is necessary that the installed intercom provides the ability to use NFC tags to control its operation.
These must be special devices that support the appropriate NFC technology for reading information, which allows access to the object. NFC intercoms are opened only with the use of appropriate tags; in this case, access using passwords or special codes will not be possible.
Secondly, not every phone or smartphone is suitable for working with this type of intercom. The phone must also support NFC technology in order to be able to communicate with the electronic intercom module. To write tags to your phone, you must use the appropriate software that matches the operating system installed on your smartphone.
Conclusion
If you want to control access to the house through your mobile device and store the intercom key in your smartphone, you should choose the intercom that supports NFC technology. You should also take care that the NFC tag with the intercom key code can be recorded on the phone. Then you do not have to carry the keys to the intercom with you, but you can get by with a smartphone, which is always at hand.
Video: Opening the entrance door with a phone
While Google and other giants are struggling unsuccessfully over contactless payment systems based on NFC (Near Field Communication) technology, other developers are trying to adapt devices that support it for other purposes. So, the other day, NXP Semiconductors and HID Global announced a basic Mobile Access solution for integrating electronic cards and NFC phones. CyberSecurity.ru .
Proximity cards for employee access to company buildings and parking areas can now be integrated into an NFC phone that stores a digital ID card. The NXP security element built into a mobile phone contains credentials that can be read from the mobile phone by access control systems and devices. NFC smartphones, which are increasingly used for access control, will provide users and businesses with the high level of security they are accustomed to, combined with the convenience of a mobile device.
The jointly developed solution also allows you to leverage the benefits of NXP and HID Global reading technologies in your physical access control infrastructure. The solution supports existing readers, which is driving the migration of access control technologies beyond traditional cards and readers to enable mobile access using digital ID.
NFC technology enables the exchange of information between devices over short (several centimeters) distances using existing standards for contactless data transmission. NFC is a development of the ISO / IEC 14443 standard, which describes the parameters of passive (without their own power source) contactless cards (such cards are used, for example, in metro tickets).
HID Global and NXP have helped create the modern market for card-based physical access solutions and are now bringing these solutions together to mobile phones as NFC becomes the standard technology.
In theory, NFC can completely replace plastic cards. The first attempt to create a full-fledged payment system based on it was the Google Wallet service, which, however, has not yet achieved much success in integrating traditional "card" and contactless payments. In 2012, American cellular operators Verizon Wireless, AT&T and T-Mobile USA promised to launch Isis, a joint mobile payments platform. Visa and PayPal also threatened to launch their NFC platforms.
Of course, NFC uses a more technically advanced authorization technology than existing cards issued by banks. However, for the technology to become truly popular, its support must also be on the side of the seller of the product or service, so for now it will hardly be possible to speak of the widespread popularity of this technology.
NXP Semiconductors is a former semiconductor division of Philips, acquired from the Dutch concern in 2006 by a consortium of private investors. The company manufactures semiconductor components for consumer electronics, automotive electronics, identity systems, and mobile devices.
The American company HID Global is considered the world leader in the production of identification devices for security and access control systems.
Smartphone using NFC. But NFC has other useful features as well. Today we will try out another one in practice: "Program" the smartphone for certain actions when recognizing the NFC tag... Why is this needed? It's simple.
For example, if you have Wi-Fi at home, every time you come from work, you need to switch to your network from the mobile Internet. Very often, when you get into the car, you need a navigator, and at work you have to turn on the silent mode. All this can be automated so as not to poke your fingers and swipe in vain. What is needed for this?
- smartphone with NFC
- NFC tag (you can use an old transport ticket with a chip)
- 3-4 minutes of free time
We mark the territory
So, our plan of action is to teach the smartphone to react in a certain way to a certain NFC tag. Each label has an identifier. The gadget must recognize it and perform the "programmed" actions. To bind actions to a tag ID, we need one of the appropriate applications - for example, NFC ReTag Free.
STEP 1. Downloading from the store, launching. We bring our label - in this case, a transport card. The application recognizes it and gives us the identifier.
STEP 2. We give the label a more understandable designation. Click on the green button "Actions" and see a list of actions that we can bind to this label.
There is a lot of interesting things here - launching applications, turning on Wi-Fi, changing the signal volume, calling a certain number ...
STEP 3. For example, let's choose the launch of Yandex.Navigator.
STEP 4. We are waiting for the OK button - in fact, everything is ready. Checking the result. We bring the unlocked smartphone to the transport card, and voila: the navigator starts automatically. We took the most "affordable" NFC tag, but you can buy a more practical one, in the form of a sticker. This can be glued, for example, to a smartphone holder in a car - install a gadget in it, and the navigator will load automatically.
NXP Semiconductors and HID Global announced their joint development - a basic Mobile Access solution for mobile NFC phones. NFC technology enables the exchange of information between devices over short distances, using existing standards for contactless data transmission.
HID Global and NXP have helped create today's marketplace for physical access map-based solutions and today are bringing these solutions together to mobile phones as NFC becomes standard technology.
Proximity cards for employee access to company buildings and parking areas can now be integrated into an NFC phone that stores a digital ID. NXP's built-in security element contains credentials that can be read from it systems and devices for access control. Increasingly used for access control, NFC smartphones will provide users and businesses with the high level of security they have come to expect when combined with a device.
The jointly developed solution also allows you to leverage the benefits of NXP and HID Global reading technologies in your physical access control infrastructure. The solution supports existing HID Global readers as well as devices based on the same company's iCLASS SIO-Enabled () platform, stimulating the migration of access control technologies beyond traditional cards and readers, and allows for mobile access using digital ID. The HID iCLASS SE readers will be based on the new NXP CLRC663 ICs and will provide full support for 13.56 MHz ISO 14443-compliant smart cards, including the MIFARE DESFIRE EV1.
To ensure compatibility, the new solution is backward compatible with the new HID Global iCLASS readers and is also compatible with HID Global's Trusted Identity Platform (TIP) ecosystem. To support NFC mobile phones without physically replacing those already installed readers, HID product users may upgrade the software version of some iCLASS devices. NXP technology allows you to manage multiple applications such as accepting payments, e-government, access control and ticketing, with a single microcontroller that guarantees secure identity recognition without compromising performance, compromising security or design performance.
Mobile Access solution on low-power IC family NXP PN65 NFC, which provide data storage resistant to unauthorized access. PN65 ICs contain NFC radio controller NXP PN544 and embedded safety element (Element, eSE). ESE implements NXP SmartMX technology, used to protect hundreds of millions of bank cards; electronic passports and electronic identification (eID) cards, transport tickets and other cards and IDs around the world. NXP will support HID Global's Secure Identity Object (SIO) technology for identity customization, storage and lifecycle management, as well as the HID Trusted Identity platform Platform(TIP) for endpoint management and security. HID SIO presents a new, founded standards-based, flexible identity structure, 
which, regardless of the technology used, allows the capabilities of smart cards to be implemented in a wide range of portable platforms, including NFC phones.
Today, a very large number of people use contactless passes: at enterprises, in dormitories, etc.
Such a pass is also called a "label". Some of the most common RFID badges have an operating frequency of 125 kHz. Internally, they consist of a wire coil and a microchip.
Such a pass is certainly not large in size, but it is still not so convenient to carry it with you every day. Moreover, if you forget, then returning home for a pass is not very pleasant.
I will show you a way to embed a pass card into a cell phone.
So, we take the pass and soak it in acetone for 1 hour. The main thing is not to overdo it, so that acetone only eats away the plastic, and not the coil with the chip. Take care of ventilation, as acetone is very toxic. Keep the decal in acetone in a container that closes to prevent excess vapors from evaporating. And be sure to ventilate the room.
After an hour, gently blue the plastic. And gently peel off the separated layers. Take out the coil with the chip.
The little black dot on the micro board is the chip with the information.
Next, we take a cell phone. Remove the back cover.
We put the coil with the chip on the back wall. We coat with nail polish. We are waiting for drying. Multiple coats can be applied.
Everything. We close the phone cover and check.
In principle, there is nothing complicated about tutu. The main thing is not to overdo it with soaking with acetone and not to break the wire when transporting from one place to another.
Now you do not need to carry a pass with you, and your phone will always be with you.
