Smart Card With Shunt Circuit Activating Fragments as RFID Tags
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Solution Overview
Problem
Existing contactless smart cards have limited functional capabilities and lack mechanisms to prevent unauthorized use or accidental multiple presentations, which can lead to financial losses and do not offer enhanced security features such as covert alerting.
Innovation Solution
A contactless smart card design featuring a primary RFID tag and additional RFID tags with shunt circuits that can be activated or deactivated by separating the card into fragments, allowing for enhanced functionality, including covert alerting and preventing accidental multiple presentations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional RFID tags are integrated into the smart card to enhance functional capabilities, then the card's versatility is improved, but the device complexity increases
Solution Approach 1:
Multiple RFID tags are integrated into a single smart card substrate, combining multiple identification functions into one device. The card includes a primary RFID tag and additional RFID tags, all mounted on the same substrate and antenna structure, enabling multiple functions without requiring separate cards.
Solution Approach 2:
The smart card is designed to perform multiple functions through integrated RFID tags. The primary RFID tag handles standard identification, while additional RFID tags provide specialized functions such as covert alerting and anti-passback capabilities, making the card universally applicable for various security and identification scenarios.
2Reliability
If shunt circuits are used to control RFID tag activation states, then unauthorized use is prevented, but the device complexity increases
Solution Approach 1:
The shunt circuits are pre-configured in a closed state during card manufacturing, keeping additional RFID tags inactive by default. This preliminary configuration ensures security before use, and the user can activate specific tags by physically opening the shunt circuit connections when needed.
Solution Approach 2:
The shunt circuit acts as an intermediary element between the antenna and the additional RFID tags. It controls the electromagnetic signal flow, allowing or blocking tag activation based on its open/closed state, thus providing a simple yet effective security mechanism without complex electronic control circuits.
3Adaptability or versatility
If the card can be separated into fragments to activate additional RFID tags, then covert alerting capability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The smart card is designed with a separable structure that can be divided into fragments along predetermined lines. The shunt circuits are routed such that breaking the card along these lines opens the shunt connections, activating additional RFID tags. This segmentation enables covert alerting functionality while maintaining straightforward manufacturing.
Solution Approach 2:
The shunt circuits are strategically positioned and routed through specific regions of the card substrate. The separation lines are designed to pass through these shunt circuit paths, ensuring that card fragmentation automatically opens the shunt connections. This local positioning strategy simplifies the overall manufacturing process by focusing precision requirements to specific critical areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The card's enhanced functional capabilities include activating additional RFID tags for specific situations, preventing unauthorized use, and offering covert alerting features, while ensuring that accidental multiple presentations are prevented, thereby enhancing security and usability.
Implementation Method 1
Contactless identification smart cards are configured with a radio frequency identification tag (RFID tag), integrated into the card, i.e. an antenna, and an electronic module, i.e. an integral microcircuit (a chip) coupled to the antenna. Such cards enable exchanging data via contactless electromagnetic communication between the card's antenna and an antenna disposed in a readout device.
Data Source
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AI summary
(EN) The invention relates to a design for a contactless smart card. In one of its embodiments, the claimed contactless identification smart card comprises an active primary RFID tag disposed inside the smart card or structurally connected thereto, has a minimum of one line for separating the card into fragments, and further comprises an additional RFID tag, which has a minimum of one shunt circuit in the form of an electrical conductor or a current-conducting connection comprising at least one current conductor, said shunt circuit being connected to an antenna of the additional RFID tag or being contactingly connected to the terminals of an integral microcircuit of the additional RFID tag, and regions of said shunt circuit passing through two adjacent fragments of the card and being structurally connected to the card so that when the card is in an ordinary, whole, state, this shunt circuit is in a state of working contact, and when said adjacent fragments are in a separated state, the shunt circuit is in a state of broken contact, wherein when the shunt circuit of the additional RFID tag is in a state of working contact, the additional RFID tag is in an inactive state, and when said shunt circuit is in a state of broken contact, the additional RFID tag is in an active state as an additional RFID tag. (RU) The invention relates to a design for a contactless smart card. In one of its embodiments, the claimed contactless identification smart card comprises an active primary RFID tag, disposed inside the smart card or structurally connected thereto, has a minimum of one line for separating the card into fragments, and further comprises an additional RFID tag, which has a minimum of one shunt circuit in the form of an electrical conductor or a current-conducting connection comprising at least one electrical conductor, said shunt circuit being connected to an antenna of the additional RFID tag or being contactingly connected to the terminals of an integral microcircuit of the additional RFID tag, and regions of said shunt circuit passing through two adjacent fragments of the card and being structurally connected to the card so that when the card is in an ordinary, whole, state this shunt circuit is in a state of working contact, and when said adjacent fragments are in a separated state, the shunt circuit is in a state of broken contact, wherein when the shunt circuit of the additional RFID tag is in a state of working contact, the additional RFID tag is in an inactive state, and when said shunt circuit is in a state of broken contact, the additional RFID tag is in an active state as an additional RFID tag.