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1. (WO2019042754) FILTER UNIT BASED DATA COMMUNICATION SYSTEM INCLUDING A BLOCKCHAIN PLATFORM
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Claims

1. System (1) adapted for performing data communication, comprising

a first interface (2) adapted to communicate with a first network (3) ;

a filter unit (4); and

a second interface (5) adapted to communicate with a second network (6) connected to the first network (3) via the filter unit (4), the second network (6) being adapted to operate as a blockchain platform (7),

wherein the filter unit (4) is adapted to selectively permit data received from the first network (3) via the first interface (2) to be transmitted to the second network (6) via the second interface (5) .

2. System (1) according to claim 1, wherein the filter unit (4) is adapted to selectively permit the data based on a data content and/or a data origin.

3. System (1) according to any of claims 1 and 2, wherein the filter unit (4) is adapted to selectively permit the data based on a user input.

4. System (1) according to any of the preceding claims, wherein the filter unit (4) is part of a) a network firewall (8) located at a transition in between the first network (3) and the second network (6) or b) a cloud-based service.

5. System (1) according to any of the preceding claims, wherein the data comprises a transaction (9), which may be processed by the blockchain platform (7) .

6. System (1) according to claim 5, wherein the filter unit (4) is adapted to perform the selective permission of the data comprising the transaction (9) independent from other transactions (9), which have been received by the filter unit (4) previously.

7. System (1) according to any of claims 5, wherein the filter unit (4) is adapted to perform the selective permission of the data comprising the transaction (9) based on other transactions (9), which have been received by the filter unit (4) previously.

8. System (1) according to any of claims 5 to 7, wherein the data comprises a classification of the transaction (9), and wherein the selective permission of the filter unit (4) is adapted to be based on the classification of the transaction (9) .

9. System (1) according to claim 8, wherein the classifica-tion of the transaction (9) comprises a security label of the transaction ( 9) .

10. System (1) according to any of claims 5 to 9, wherein the filter unit (4) is adapted for receiving, from a transaction approval unit (10) of the first network (3), instructions for blocking the transaction (9), if the transaction approval unit (10) does not receive a predetermined number of approval messages from respective participants.

11. System (1) according to any of claims 5 to 10, further comprising a labelling unit, which is adapted to label the data comprising the transaction (9) permitted by the filter unit (4) using a checksum, wherein the label is indicative of the respective filter unit (4) of a plurality of filter units (4) .

12. System (1) according to any of claims 5 to 11, further comprising a modification unit, which is adapted to modify the transaction (9) permitted by the filter unit (4), wherein the modified transaction is transmitted to the second network

(6) via the second interface (5) and the non-modified transaction is not transmitted to the second network (6) via the second interface (5) .

13. System (1) according to any of the preceding claims, wherein the filter unit (4) is further adapted to selectively permit data received from the second network (6) to be trans-mitted to the first network (3) .

14. System (1) according to any of the preceding claims, wherein the first network (3) is a private network (11) and/or the second network (6) is a public network (12) .

15. Method (100) for performing data communication, comprising :

selectively permitting (130) data received from a first network (3) to be transmitted to a second network (6) , the second network (6) being operated as a blockchain platform

(7) based on the permitted data.

16. Method according to claim 15, which is performed by a system (1) according to any of claims 1 to 14.