Electronic node and method for maintaining a distributed ledger

1. An electronic device for maintaining a distributed ledger, which is maintained by multiple electronic nodes, wherein the distributed ledger includes multiple blocks which are associated at least with one of previously recorded blocks and wherein a new block can be added to the distributed ledger based on a mining process by at least a part of the multiple electronic nodes, the electronic device comprising circuitry configured to:

perform a mining process of the new block to be added to the distributed ledger, wherein the mining process includes:

obtaining a hash from the previously recorded blocks,

using the hash to select a subset of dictionary elements from a predefined dictionary,

computing a sparse representation of each sub-block of the new block based on the selected subset of dictionary elements to compress data of the new block, and

adding the compressed new block to the distributed ledger, wherein the distributed ledger represents digital currency used to buy physical goods and/or services.

2. The electronic device of claim 1 , wherein the circuitry is further configured to perform a compression algorithm for compressing data.

3. The electronic device of claim 2 , wherein the compression algorithm is based on a non-deterministic polynomial-time hard search problem.

4. The electronic device of claim 1 , wherein the compression of the data is further based on a current state of the distributed ledger.

5. The electronic device of claim 1 , wherein each block includes multiple sub-blocks, wherein each sub-block includes at least one of: transaction data, video data, image data, audio data, document data.

6. The electronic device of claim 1 , wherein the compression includes representing data of the block based on the predefined dictionary.

7. The electronic device of claim 6 , wherein the predefined dictionary includes a set of the dictionary elements and the set of the dictionary elements is adapted to the data of the block to be compressed.

8. The electronic device of claim 7 , wherein the subset of the set of the dictionary elements is selected based on a current status of the distributed ledger.

9. A method for maintaining a distributed ledger, which is maintained by multiple electronic nodes, wherein the distributed ledger includes multiple blocks which are associated at least with one of previously recorded blocks and wherein a new block can be added to the distributed ledger based on a mining process by at least a part of the multiple electronic nodes, the method comprising:

performing a mining process of the new block to be added to the distributed ledger, wherein the mining process includes:

obtaining a hash from the previously recorded blocks,

using the hash to select a subset of dictionary elements from a predefined dictionary,

computing a sparse representation of each sub-block of the new block based on the selected subset of dictionary elements to compress data of the new block, and

adding the compressed new block to the distributed ledger, wherein the distributed ledger represents digital currency used to buy physical goods and/or services.

10. The method of claim 9 , wherein the compression of data is based on a compression algorithm for compressing data.

11. The method of claim 10 , wherein the compression algorithm is based on a non-deterministic polynomial-time hard search problem.

12. The method of claim 9 , wherein the compression of the data is further based on a current state of the distributed ledger.

13. The method of claim 9 , wherein each block includes multiple sub-blocks, wherein each sub-block includes at least one of: transaction data, video data, image data, audio data, document data.

14. The method of claim 9 , wherein the compression includes representing data of the block based on the predefined dictionary.

15. The method of claim 14 , wherein the predefined dictionary includes a set of the dictionary elements.

16. The method of claim 15 , wherein the set of the dictionary elements is adapted to the data of the block to be compressed.

17. The method of claim 16 , wherein the subset of the set of the dictionary elements is selected based on a current status of the distributed ledger.