Contactless Personalization Device Signal Superposition Security
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Solution Overview
Problem
Existing devices for personalizing contactless data carriers, such as chip cards, face challenges in securing communication against eavesdropping, especially when multiple reading devices are used in close proximity, as data is often transmitted unencrypted, making security-critical information vulnerable to interception.
Innovation Solution
A personalization device with spatially adjacent reading devices is controlled to superimpose potentially safety-critical personalization data with random data, ensuring that even if an attacker intercepts the signals, they cannot extract the security-critical information, by synchronizing the transmission of personalization data with random data from adjacent readers, preventing inference of the original data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple reading devices are arranged spatially adjacent for parallel personalization, then throughput rate is improved, but security against eavesdropping deteriorates because reading devices interfere with each other and unencrypted data can be intercepted
Solution Approach 1:
The patent converts the harmful interference between multiple reading devices into a beneficial security feature. By deliberately transmitting random data from adjacent reading devices, the interference pattern becomes a protective mechanism that masks security-critical data, transforming the previously harmful signal overlap into a useful encryption-like effect that prevents eavesdropping while maintaining parallel processing capability
Solution Approach 2:
The patent introduces random data as an intermediary substance that carries no information but serves a protective function. This intermediary random data is transmitted alongside security-critical data from multiple reading devices, acting as a mediator that obscures the meaningful information from eavesdroppers while allowing the legitimate personalization process to proceed in parallel
2Productivity
If data is transmitted unencrypted to increase speed, then productivity is improved, but security deteriorates because security-critical data can be read in plain text by attackers
Solution Approach 1:
The patent converts the previously harmful effect of signal interference into a beneficial security mechanism. The random data transmitted from adjacent reading devices creates an interference pattern that naturally masks security-critical data, transforming what would normally be considered useless or harmful interference into an effective form of data protection without requiring additional encryption infrastructure
Solution Approach 2:
The system performs self-protection through its own operational characteristics. The multiple reading devices, in their normal parallel operation, automatically generate the protective random data signals as part of their standard function, eliminating the need for separate encryption systems or additional security hardware. The system protects itself using its inherent parallel processing capability
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
This approach effectively prevents eavesdropping of security-critical data during the personalization process, enhancing the security of contactless communication in environments with multiple reading devices by ensuring intercepted signals cannot be decoded to reveal sensitive information.
Implementation Method 1
contactless data transmission from a reading device to a contactless data carrier
Data Source
AI summary
The device (10) has reading devices (12a to 12d), which are formed to transmit data to a contactless data carrier. The reading devices are controlled such that a reading device-personalization data is transmitted to a contactless data carrier. A reading device random data is superimposed with the personalization data. A central control unit (20) is provided for controlling the reading devices. An independent claim is included for a method for personalizing contactless data carriers, particularly contactless chip cards.