Project Information on RFID Based Paid Car Parking System?

You can check Ski Data or Omnitech website for more detailed information.For projects check - RFID based Car Parking Management System - RFID Projects

Project Information on RFID Based Paid Car Parking System? 1

1. are RFID chips being implanted into people?

We live in a world where a few control the masses. This is hard to accept when you are one of the masses. It is hard to believe medications, vaccines, and baby-formulas are designed to make people week; poisoned water with florid and other chemicals; chem-trails, etc., etc... Your mind can go crazy if you know your existence on this planet is doomed. That is why people choose not to accept it, or to start panicking about it. It is very hard to accept it and remain calm. The truth is being disguised so much that is very hard to see trough all the lies we've being told over and over again. The choice is yours - whether you want to believe it, or close your eyes. But "there is no smoke without a fire". Search the internet and you will find plenty of evidence. Are you ready to hear it? What would you do if what your mother in law is saying is all true?

2. What is the current state of RFID / NFC security?

Most proximity card based systems use some variation of ISO 14443 to communicate between the card and the reader, but are not necessarily based on NFC. (RFID is a rather all-encompassing term, itself covering almost any use of radio waves to identify a target.) Beyond that, there has been significant evolution in what is sent across the RF. Many people think of RFID tags that send a single static number when they are interrogated, and these tags do exist -- they are often used for inventory tracking or similar functions. They are not, however, generally used for access control. Systems for access control involve challenge-response and cryptography in their operations. Even the long-broken MIFARE Classic uses cryptography, but it uses an only 48-bit key, and some weaknesses were identified that allow for ciphertext-only attacks or active attacks when talking to the reader. Since 2015, NXP has recommended new installations not use MIFARE classic.More modern systems like DESFire EV2 have not yet shown cryptographic weaknesses, but that is no guarantee of long-term strength, it's just not currently possible to clone such a card. (As you do not have the right keys to talk to the card.) Of course, if you can get your hands on a legitimate reader with the keys baked in, you can read them, but I believe NXP recommends a per-site key.Over in the HID side of things, they use a slightly different technology. HID proxcards (iClass and so forth) have actually been remarkably resilient in general. iClass was problematic because of a globally shared key -- IIRC, it was originally extracted from a reader that did not use a secure element to store the key. iClass SE rotated the key and allowed individual sites to reprogram readers to use custom keys. iClass SEOS actually runs a full JavaCard so can do a number of things with the embedded chip. At the very least, it will be able to emulate iClass SE (and I believe they've licensed DESFire EV2 and can emulate it as well).Despite all of that research, very many sites are still using HID iClass, classic Proxcard, or MIFARE Classic for access control. In the consulting world, you will see no shortage of opportunities for badge cloning

Project Information on RFID Based Paid Car Parking System? 2

3. Can I locate the object by reading its signal with RFID readers?

I worked on a system that aimed to do just this using 900 MHz semi-passive RFID tags (battery powered tag silicon but purely passive communication, it gives you a lot more range since the tag does not have to harvest enough energy to power up).ToF or TDoA (Time of Flight or Time Difference of Arrival) do not work well for RFID. You can do a measurement of phase difference between transmitted and received signal and that will give you the fractional part of the wavelength in your range to the tag but solving the number of complete wavelengths is not possible with standard hardware (at least we could not find a solution). Our solution was to take a series of readings along one side of the field (it took about 10). The readings were not all taken from the same height above the ground. We then took the RSSI numbers from the readings and from that calculated the tag location and height. We were taking readings sequentially from the same receiver that was moving but there is no reason why you could not use a set of fixed readers.The calculations ended up being non-trivial. You have the standard inverse square law for the signal strength but you also need to factor in the ground bounce, that will depend on antenna heights, frequency and ground material. You get both direct and ground path signals in both directions giving a total of 4 different signal paths that are interfering with each other. You then also have to factor in tag and receiver gain patterns.However once you have a good enough model you can create a probability map of where in the field the tag is likely to be based on the observed signals. It was taking matlab about 20 minutes to crunch the numbers on a 10 year old PC. I managed to get the end results to normally be within 20-30 cm of truth at ranges of up to 40 m.When it worked we managed to get this down to around 5 cm error by factoring in the partial phase information of the returned signal but that was unreliable at times.The killer problem ended up being that as soon as you added any RF absorbing/reflecting objects into the environment (e.g. people, animals or anything made of metal) then the whole system fell apart.For the sort of problem you are describing I would normally say to go with a UWB based TDoA based system. That will give you 10-50 cm accuracy depending on how well the system is dialed in with low latency and be fairly immune to environmental changes if base station antennas are mounted high enough. While not as cheap as an RFID tag you can make the tags in the $25 range and run them off a watch battery of a year or more.

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