CN113661500A - Switch button for contactless passive NFC and RFID devices - Google Patents

Abstract

The claimed subject matter of the invention relates to a switch button for contactless passive NFC and RFID devices, which is constituted by a contactless passive NFC and RFID unit and is characterized in that the unit is equipped with a membrane button (fig. 1), which, when the unit is brought close to an authorized reader and pressed, activates an internal antenna (fig. 3-7) which exchanges data with the reader by means of the charge emitted by the reader, and when the pressing is stopped, the unit remains locked (fig. 2-7) until pressed again without any external security system. Possible reading of e.g. contactless smart bank cards, contactless smart national identity cards (DNI), smart passports and smart keys by malicious readers that pose a threat to this system can be prevented.

Description

Switch button for contactless passive NFC and RFID devices

Description of the invention

Switch buttons for contactless (contactless) passive NFC and RFID devices. In general, the present invention relates to passive NFC and RFID devices that do not have their own power source and require the exchange of data by charges generated by the electromagnetic field of other devices. For example, contactless smart bank cards: the non-contact bank card with the chip can realize various operations such as bank transaction, general purchase, multiple payment and other non-contact operations through the antenna integrated in the card. (DNI) citizen identification card: for determining the identity of citizens of a particular country. Passport: is the passing certification of people among countries. The intelligent key: for access control in specific private or government locations.

Background

The main threat that the use of the prior art may pose to the user's privacy is that an external malicious reader tries to read the user's personal and private information stored on passive NFC and RFID devices. This information is exposed to the threat of increasingly complex attacks.

With the present invention, each cell will be locked and activated by pressing a button (fig. 3) within the cell (fig. 1#1) once only when the cardholder needs to use and know where to use the card. It does not affect the normal functioning of any existing device, so it is clean, safe to introduce into the market, and easy to use for the user.

State of the art

There is no similar system on the market today. There are several ways to do this: a card case covering the unit to prevent external reading, and a wallet, a purse, or a card attached to the contactless unit to shield the exchange of stored information, which covers the unit in the same way. Further, there is also a device entitled "tamper for detecting communication objects against fraud protected device" disclosed in publication No. US 8.602.306B 2 published on 5/1 of 2009, but it is cumbersome for users and manufacturers.

Disclosure of Invention

The embodiment of the invention is characterized in that: providing a circuit that establishes a connection with the two terminals (fig. 6-28, 29) when the metal film button (fig. 3-7) or any other rigid or non-rigid material button that accomplishes this function is depressed; when the button located in the antenna circuit (fig. 2-4) stops being pressed, the spring (fig. 5-25) restores the circuit to the initial position; the antenna is a copper antenna (fig. 6-27) or any other conductive material antenna, woven or printed on a sheet or other medium, establishing a communication connection in any form, shape, size and composition, the button being called a switch. In case the button is not pressed, the contactless passive NFC and RFID unit will always be locked against information exchange or access by other malicious devices, thereby avoiding that the information stored in the unit is in danger. These devices have two antennas or two memory units (fig. 5) inside the unit for different functions, depending on the requirements of the authorized interrogation device (fig. 3-8) for different specific operations. In both cases, only one button (fig. 5-25) is used to avoid interfering with other operations of the unit. For example, the introduction of a chip into an automatic teller machine, a portable device, a magnetic stripe, etc. enables a connection to be established with two circuits or two storage units. When the button is pressed (fig. 5-25), the cardholder is able to fully control the unit without the need for additional external security devices. On top is a cover layer of PVC or any other material that meets the manufacturing standards, which covers the whole circuit in a circular shape and leaves a space for the movement of the spring (fig. 4-20), where a metal membrane button (fig. 4-19) is placed, which is fixed by means of adhesive tape or any other medium capable of fixing the metal membrane. Then another similar cover layer is placed over the entire circuit, with bumps right at the locations of the metal films. Finally a transparent sheet is placed, also with corresponding projections, to give the unit a gloss. It is placed in an oven for final sealing. Of course, the production needs to be done in proportion, and according to the current normal production flow, the size of the sheet is larger and the form of the antenna is also larger.

Drawings

1) (FIG. 1) non-contact type switch button

2) (FIG. 1) chip of contactless card

3) (FIG. 1) physical location of switch buttons on contactless card

4) (FIG. 2) non-pressed state of button

5) (FIG. 2) card proximity to authorized reader device

6) (FIG. 2) authorized devices refuse to read the card without pressing the button

7) (FIG. 3) pressing the card button and approaching an authorized reader

8) (FIG. 3) authorized reader to accept card transactions with button pressed

9) (FIG. 4) chip space on transparent PVC cover with raised button portion

10) (FIG. 4) transparent PVC cover layer having convex button portion covering the whole circuit unit

11) (FIG. 4) chip space on cover with raised button portion covering circuitry

12) (FIG. 4) with a cover layer covering the raised button portion of the circuit

13) (FIG. 4) chip space on cover layer with round hole on button part of cover circuit

14) (FIG. 4) cover layer with round hole for covering metal film portion of circuit

15) (FIG. 4) circuit terminals at which chips are connected

16) (FIG. 4) antenna for receiving device charge and exchanging stored data

17) (FIG. 4) raised portions on the transparent PVC layer covering the buttons

18) (FIG. 4) the convex portion of the button covering the whole circuit on the transparent PVC layer

19) (FIG. 4) circular or non-circular metal films or other rigid or non-rigid material films for performing this function

20) (FIG. 4) circular or non-circular holes defined according to the shape of the metal film

21) (FIG. 4) spring with inside and outside terminals at the position where the metal film is mounted

22) (fig. 5) antenna (1) in passive NFC and RFID unit, containing multiple antennas

23) (FIG. 5) Passive NFC and RFID device with multiple memory cells

24) (fig. 5) antenna (2) in passive NFC and RFID unit, containing multiple antennas

25) (FIG. 5) connection of two antennas and two storage units to a spring

26) (FIG. 6) chip connected to antenna Circuit

27) (FIG. 6) antenna for passive NFC and RFID units

28) (FIG. 6) spring external connection terminal

29) (FIG. 6) spring internal connection terminal

Claims (2)

1. A switch button for a contactless passive NFC and RFID device, the switch button comprising:

a) a push-button made of a metal film or any other rigid or non-rigid material film, having a circular or any other shape;

b) a circuit which, upon pressing a button located within the contactless passive NFC and RFID unit, establishes a connection (7) between the two terminals;

c) a spring (21) which restores the circuit to an initial position after stopping pressing the button;

d) an antenna (27) made of copper or any other conductive material, woven or printed on a sheet or other medium, establishing communication in any form, shape, size and composition, generally open at the end opposite the chip or information storage unit, or at any position inside the circuit that does not affect the various operations of the unit;

e) a cover layer covering the whole circuit in a circular shape and leaving a space for the movement of the spring for placing a metal membrane button (20), the cover layer being made of PVC or any other material that meets the manufacturing standards;

f) adhesive tape or any other material, medium or form capable of fixing the above-mentioned metal film on the spring (19, 20, 21);

g) a covering layer of a bump (18) covering the whole circuit and capable of being freely pressed and released, made of PVC or other material meeting the manufacturing standard, at the position where the metal film is located;

h) a transparent sheet also having corresponding protrusions (17) to give the unit a lustre.

2. A switch button for a contactless passive NFC and RFID device, characterized by:

1) a button, which is located in the circuit of the passive NFC and RFID units, protruding through a small bump of each unit, establishes the required communication connection through the electromagnetic field of the authorized interrogation device, which is in a locked state before pressing the button, establishes a connection between the two terminals after being pressed;

2) the spring restores the circuit to the initial position after stopping the push of the button to lock the unit from any authorized or unauthorized access;

3) unlike other methods, the entire circuit is located inside the cell, thus eliminating the need for any other type of external security system;

4) it is compatible with any type of manufactured product, depending on the different needs of today's global market.

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