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@Select Types{,
Journal = "Band-1",
Title= "Confidentiality-preserving Validation of Tax Documents on the Blockchain",
Author= "Filip Fatz, Philip Hake, Peter Fettke",
Doi= "https://doi.org/10.30844/wi_2020_l1-fatz",
Abstract= "Information exchange between tax administrations, businesses, and auditors is key to effective tax enforcement. Therefore, organizations proposed the application of blockchain technology to interconnect the different actors and increase tax transparency. However, the lack of confidentiality measures hampers further development. Especially, businesses are concerned about the disclosure of commercially sensitive information that might threaten their competitive advantage. In this paper, we investigate how the application of zero-knowledge-proofs can contribute to solving the dilemma between transparency and confidentiality in blockchain-based tax systems. To meet this end, we provide a conceptual design of a confidentiality-preserving distributed tax ledger. Moreover, we present a prototype addressing reporting obligations in the context of value-added tax. Our evaluation shows that zero-knowledge proofs are an effective measure to trade off transparency against confidentiality. Still, their application is challenging and future research must focus on better abstractions of proving statements.
",
Keywords= "blockchain, tax compliance, confidentiality, data protection",
}
Filip Fatz, Philip Hake, Peter Fettke: Confidentiality-preserving Validation of Tax Documents on the Blockchain. Online: https://doi.org/10.30844/wi_2020_l1-fatz (Abgerufen 25.12.24)
Open Access
Abstract
Abstract
Information exchange between tax administrations, businesses, and auditors is key to effective tax enforcement. Therefore, organizations proposed the application of blockchain technology to interconnect the different actors and increase tax transparency. However, the lack of confidentiality measures hampers further development. Especially, businesses are concerned about the disclosure of commercially sensitive information that might threaten their competitive advantage. In this paper, we investigate how the application of zero-knowledge-proofs can contribute to solving the dilemma between transparency and confidentiality in blockchain-based tax systems. To meet this end, we provide a conceptual design of a confidentiality-preserving distributed tax ledger. Moreover, we present a prototype addressing reporting obligations in the context of value-added tax. Our evaluation shows that zero-knowledge proofs are an effective measure to trade off transparency against confidentiality. Still, their application is challenging and future research must focus on better abstractions of proving statements.
Keywords
Schlüsselwörter
blockchain, tax compliance, confidentiality, data protection
References
Referenzen
1. Richardson, G.: Determinants of tax evasion: A cross-country investigation. Journal of International Accounting, Auditing and Taxation 15, 150–169 (2006).
2. World Bank Group: Doing Business 2017: Equal Opportunity for All. (2016).
3. Center for Social and Economic Research (CASE), Institute for Advanced Studies: Study and Reports on the VAT Gap in the EU-28 Member States: 2018 Final Report: TAXUD/2015/CC/131.
4. Bundesministerium der Finanzen: Gesetz zur Modernisierung des Besteuerungsverfahrens.
5. Putz, R.: Italien als digitaler Vorreiter: Flächendeckende Verpflichtung zur E-Rechnung B2B und B2C eingeführt. Rethinking Tax 1, 62–67 (2019).
6. Owens, J.: Tax Transparency and BEPS. Journal of Tax Administration 1, 5–14 (2015).
7. Wijaya, D. A., Liu, J. K., Suwarsono, D. A., Zhang, P.: A New Blockchain-Based Value- Added Tax System. In: International Conference on Provable Security (ProvSec), pp. 471– 486 (2017).
8. Hoffman, M.: Can Blockchains and Linked Data Advance Taxation. In: Companion Proceedings of the The Web Conference (WWW), pp. 1179–1182 (2018).
9. Hyvärinen, H., Risius, M., Friis, G.: A Blockchain-Based Approach Towards Overcoming Financial Fraud in Public Sector Services. Business & Information Systems Engineering 59, 441–456 (2017).
10. Ainsworth, R. T., Shact, A.: Blockchain (Distributed Ledger Technology) Solves VAT Fraud. SSRN Electronic Journal (2016).
11. Lyons, T., Courcelas, L., Timsit, K.: Blockchain for Government and Public Services. (2018).
12. Fatz, F., Fettke, P., Hake, P., Risse, R.: Potenziale von Blockchain-Anwendungen im Steuerbereich. HMD Praxis der Wirtschaftsinformatik 55, 1231–1243 (2018).
13. Fatz, F., Hake, P., Fettke, P.: Towards Tax Compliance by Design: A Decentralized Validation of Tax Processes Using Blockchain Technology. In: Proceedings of the IEEE Conference on Business Informatics (CBI), pp. 559-568 (2019).
14. Ainsworth, R. T., Alwohaibi, M., Cheetham, M.: VATCoin: The GCC’s Cryptotaxcurrency. SSRN Electronic Journal (2017).
15. Ainsworth, R. T., Alwohaibi, M.: Blockchain, Bitcoin, and VAT in the GCC: The Missing Trader Example. SSRN Electronic Journal (2017).
16. German Federal Office for Information Security: BSI-Standard 100-2: IT-Grundschutz Methodology. (2008).
17. Mendling, J., Weber, I., van der Aalst, W. M. P., vom Brocke, J., Cabanillas, C., Daniel, F., Debois, S., Di Ciccio, C., Dumas, M., Dustdar, S., Gal, A., García-Bañuelos, L., Governatori, G., Hull, R., La Rosa, M., Leopold, H., Leymann, F., Recker, J., Reichert, M., Reijers, H. A., Rinderle-Ma, S., Solti, A., Rosemann, M., Schulte, S., Singh, M. P., Slaats, T., Staples, M., Weber, B., Weidlich, M., Weske, M., Xu, X., Zhu, L.: Blockchains for Business Process Management – Challenges and Opportunities. ACM Transactions on Management Information Systems 9, 4:1–4:16 (2018).
18. Peffers, K., Tuunanen, T., Rothenberger, M. A., Chatterjee, S.: A design science research methodology for Information Systems Research. Journal of Management Information Systems 24, 45–77 (2007).
19. International Organization for Standardization (ISO) and International Electrotechnical Commission: ISO/IEC 27001: Information technology – Security techniques – Information security management systems – Requirements (2005).
20. Owens, J.: Tax Transparency: The „Full Monty“. Bulletin for International Taxation 68 (2014).
21. Karajovic, M., Kim, H. M., Laskowski, M.: Thinking Outside the Block: Projected Phases of Blockchain Integration in the Accounting Industry. Australian Accounting Review 29, 319–330 (2019).
22. Nakamoto, S.: Bitcoin: A peer-to-peer electronic cash system, http://www.bitcoin.org/bitcoin.pdf [Accessed: 29.10.2019] (2009).
23. Yu, T., Lin, Z., Tang, Q.: Blockchain: The Introduction and Its Application in Financial Accounting. Journal of Corporate Accounting & Financ 29, 37–47 (2018).
24. Viriyasitavat, W., Hoonsopon, D.: Blockchain characteristics and consensus in modern business processes. Journal of Industrial Information Integration 13, 32–39 (2019).
25. Benet, J.: IPFS – Content Addressed, Versioned, P2P File System. arXiv:1407.3561 (2014).
26. Katz, J., Lindell, Y.: Introduction to Modern Cryptography. Chapman & Hall/CRC (2014).
27. Goldwasser, S., Micali, S., Rackoff, C.: The knowledge complexity of interactive proof systems. SIAM Journal on Computing 18, 186–208 (1989).
28. Bitansky, N., Chiesa, A., Ishai, Y., Paneth, O., Ostrovsky, R.: Succinct Non-interactive Arguments via Linear Interactive Proofs. In: Proceedings of the Theory of Cryptography Conference (TCC), pp. 315–333 (2013).
29. Beck, R., Avital, M., Rossi, M., Thatcher, J. B.: Blockchain Technology in Business and Information Systems Research. Business & Information Systems Engineering 59, 381–384 (2017).
30. Dinh, T. T. A., Wang, J., Chen, G., Liu, R., Ooi, B. C., Tan, K.-L.: BLOCKBENCH: A Framework for Analyzing Private Blockchains. In: Proceedings of the ACM International Conference on Management of Data (SIGMOD), pp. 1085–1100 (2017).
31. Wood, G.: Ethereum: a secure decentralised generalised transaction ledger. Ethereum Project Yellow Paper (2014).
32. Eberhardt, J., Tai, S.: ZoKrates – Scalable Privacy-Preserving Off-Chain Computations. In: Proceedings of the IEEE International Conference on Blockchain (2018).
33. Truffle, https://truffleframework.com [Accessed: 24.10.2019].
34. Pedersen, T. P.: Non-Interactive and Information-Theoretic Secure Verifiable Secret Sharing. In: Proceedings of the Annual International Cryptology Conference (CRYPTO), pp. 129–140 (1992).
35. Bowe, S., Gabizon, A., Green, M. D.: A Multi-party Protocol for Constructing the Public Parameters of the Pinocchio zk-SNARK. In: Proceedings of the International Conference on Financial Cryptography and Data Security (FC), pp. 64–77 (2019).
36. Ben-Sasson, E., Chiesa, A., Garman, C., Green, M., Miers, I., Tromer, E., Virza, M.: Zerocash: Decentralized anonymous payments from bitcoin. In: Proceedings of the IEEE Symposium on Security and Privacy (SP) (2014).
37. Kosba, A., Miller, A., Shi, E., Wen, Z., Papamanthou, C.: Hawk: The Blockchain Model of Cryptography and Privacy-Preserving Smart Contracts. In: Proceedings of the IEEE Symposium on Security and Privacy (SP), pp. 839–858 (2016).
38. Zyskind, G., Nathan, O., Pentland, A.: Enigma: Decentralized Computation Platform with Guaranteed Privacy. arXiv:1506.03471 (2015).
39. Narula, N., Vasquez, W., Virza, M.: zkLedger: Privacy-Preserving Auditing for Distributed Ledgers. In: Proceedings of the USENIX Symposium on Networked Systems Design and Implementation (NSDI), pp. 65–80 (2018).
40. Wang, Y., Kogan, A.: Designing confidentiality-preserving Blockchain-based transaction processing systems. International Journal of Accounting Information Systems 30, 1–18 (2018).