Blockchain Banknote Security Element for Anonymous Cashless Payments
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Solution Overview
Problem
Existing banknotes lack the ability to facilitate cashless payments and maintain anonymity while ensuring secure transactions and efficient management of monetary value.
Innovation Solution
A banknote equipped with a security element containing a processor and memory, which includes a banknote-specific private cryptographic key and blockchain address, enabling secure cashless transactions and management of nominal value through a blockchain system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cash payment methods are used, then anonymity and universal accessibility are maintained, but cashless payment capability and efficient remote transaction processing are lost
Solution Approach 1:
The patent merges traditional cash payment functionality with cashless digital payment capabilities by embedding a security element containing a processor and cryptographic key pair directly into the banknote. This allows the banknote to function both as physical cash and as a digital payment instrument, enabling dual payment modes without requiring separate systems.
Solution Approach 2:
The banknote is designed with multi-functionality, serving as both a traditional cash payment medium and a cashless payment instrument. The security element enables the banknote to perform cryptographic operations for digital transactions while maintaining its physical form for cash payments, making it adaptable to different payment scenarios.
2Productivity
If cashless payment systems are implemented, then efficient remote transaction processing is enabled, but anonymity and independence from traditional account systems are reduced
Solution Approach 1:
The patent introduces a blockchain-based payment transaction log as an intermediary that records transactions without requiring traditional bank account systems. The banknote's security element interacts with the blockchain to enable cashless payments while the decentralized nature of blockchain preserves anonymity better than traditional centralized payment systems.
3Reliability
If blockchain technology is integrated into banknotes, then secure transaction authorization and monetary value management are achieved, but physical handling costs and complexity increase
Solution Approach 1:
The patent extracts the cryptographic verification functionality into a separate security element that is embedded in the banknote. This security element contains the processor and memory with cryptographic key pair, separating the complex cryptographic operations from the main banknote structure while maintaining security.
4Loss of information
If traditional account systems are used for cashless payments, then transaction tracking is enabled, but physical handling costs and system dependency increase
Solution Approach 1:
The patent creates a digital copy of the banknote's value and identity information in the blockchain system. The security element in the banknote contains cryptographic information that corresponds to an entry in the blockchain, allowing the physical banknote to be tracked and verified digitally without requiring traditional bank account systems.
Data Source
AI summary
A banknote includes a security element with a processor and a memory. A private cryptographic key of an asymmetric key pair of the banknote is stored in a protected memory area of the memory. The asymmetric key pair is assigned to a banknote-specific blockchain address in a blockchain. A payment method executed with the banknote includes receiving a payment request for a payment with the banknote in the form of a transaction of an amount to be paid from the blockchain address of the banknote to a blockchain address of a payee, signing a transaction approval with the private cryptographic key of the banknote, and sending the signed transaction approval.