Standalone device for digital currency

Abstract

Standalone device for digital currency, consisting of: - an electronic memory integrated into the device for storing digital values, - a local interface for the direct transfer of values ​​between two devices without a network connection, - an internal control unit for updating the stored values, without requiring any external infrastructure for validation.

Description

[0001] The invention relates to a device for storing and transmitting digital values ​​between two electronic units without a network connection. It belongs to the field of electronic payment systems and data transmission technologies.

[0002] Well-known digital payment systems are predominantly based on central network infrastructures, such as online banking or contactless card payments. These systems require external servers to validate transactions and are not fully usable offline. Offline solutions usually consist of cash or physical media, but lack digital adaptability or controlled transferability.

[0003] The object of the invention is to provide an electronic device that can store digital values ​​completely offline and transfer them between two devices without requiring external infrastructure or network connections. The system should be usable anonymously, inexpensive to manufacture, and robust against infrastructure and network failures.

[0004] The task is solved by the device: - has an integrated electronic memory for storing a value amount, - has a local interface for direct connection to a second device, - includes an internal control unit that updates the stored value according to a transaction, - and the transmission takes place via a physical (especially electrical) connection, without external validation by servers or networks. embodiment

[0005] A preferred embodiment includes: - a microcontroller unit (e.g. Arduino platform), - a non-volatile memory for value management, - a wired data connection (e.g. serial connection), - software for carrying out value transfer and updates.

[0006] Optionally, the device can include a display unit to show the stored value and controls to confirm a transaction. A cryptographic security module can also be used to secure the transfer of value. Example of implementation

[0007] In a preferred embodiment, the system comprises two electronic units, each consisting of a microcontroller (e.g., Arduino UNO) with integrated USB power supply. Both units have non-volatile memory for storing a numerical credit value.

[0008] The two microcontrollers are connected to each other via digital inputs and outputs using a direct wired connection to carry out a transaction.

[0009] At least three lines are used for this: ground (GND), a data output from the first unit (TX1), and a data input from the second unit (RX2). Optionally, additional lines can be used for acknowledgment or error correction.

[0010] The transaction occurs when the first unit transfers a predefined amount to the second unit. After receiving and internally verifying the transfer, the second unit updates its stored balance by the received amount and sends a confirmation back to the first unit. Only after successfully receiving this confirmation does the first unit reduce its balance by the transferred amount.

[0011] No connection to a network or external server exists during the transaction. The transfer takes place entirely locally and without an internet or wireless connection. This ensures the process remains independent of external systems and enables offline-based value transfer. Advantages of the invention

[0012] The invention enables: - Fully offline usable digital value transfer, - low system requirements, - Use without network coverage, - easy expandability, - anonymous use similar to cash, - Robustness against infrastructure and network failures. Reference symbol list 1 Device A 2 Storage A 5 Physical connection (cable) 7 Device B 8 Storage B 12 Initial state 13 Waiting state 14. Amount verification 15 Rejections 16 Credit Change Device A 17 Confirmation 18 Credit Change Device B 19 Conclusion / Log Signals: 20 transaction requests 21 Confirmation 22 Value reduction 23 Success stories

Claims

[1] Standalone device for digital currency, consisting of: - an electronic memory integrated into the device for storing digital values, - a local interface for the direct transfer of values ​​between two devices without a network connection, - an internal control unit for updating the stored values, without requiring any external infrastructure for validation. [2] Standalone device for digital currency according to claim 1, characterized by that the transfer of values ​​is secured by a cryptographic procedure. [3] Standalone device for digital currency according to any of the preceding claims, characterized by , that values ​​can be transferred in both directions between two devices. [4] Standalone device for digital currency according to any of the preceding claims, characterized bythat the transmission takes place via a physical, preferably a direct electrical connection. [5] Standalone device for digital currency according to any of the preceding claims, characterized by that the devices are authenticated before the value is transferred. [6] Standalone device for digital currency according to any of the preceding claims, characterized by that the device has a display unit to show the stored value. [7] Standalone device for digital currency according to any of the preceding claims, characterized by that the device has at least one control element for confirming the transaction.

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