Steganographic Analysis of Blockchains

Sensors

Alexandre Augusto Giron¹  Ricardo Custódio²  Jean Everson Martina² 

[1] Department of Computer Science, Federal University of Technology–Parana (UTFPR), 85902-490 Toledo, PR, Brazil;Graduate Program on Computer Science, Department of Informatics and Statistics, Federal University of Santa Catarina (UFSC), 88040-370 Florianópolis, SC, Brazil;

关键词: blockchain;    steganography;    steganalysis;    bitcoin;    ethereum;   

DOI  :  10.3390/s21124078

来源: DOAJ

【 摘 要 】

Steganography is one of the ways to hide data between parties. Its use can be worrisome, e.g., to hide illegal communications. Researchers found that public blockchains can be an attractive place to hide communications; however, there is not much evidence of actual use in blockchains. Besides, previous work showed a lack of steganalysis methods for blockchains. In this context, we present a steganalysis approach for blockchains, evaluating it in Bitcoin and Ethereum, both popular cryptocurrencies. The main objective is to answer if one can find steganography in real case scenarios, focusing on LSB of addresses and nonces. Our sequential analysis included 253 GiB and 107 GiB of bitcoin and ethereum, respectively. We also analyzed up to 98 million bitcoin clusters. We found that bitcoin clusters could carry up to 360 KiB of hidden data if used for such a purpose. We have not found any concrete evidence of hidden data in the blockchains. The sequential analysis may not capture the perspective of the users of the blockchain network. In this case, we recommend clustering analysis, but it depends on the clustering method’s accuracy. Steganalysis is an essential aspect of blockchain security.

【 授权许可】

Unknown