# A Universal Privacy-Preserving Multi-Blockchain Aggregated Identity Scheme
## 3 System Design
### Management of the Authorized Addresses
#### 3.4.2 Construction of the Accumulator
Corresponding laws, regulations, and supervisory mechanisms are necessary to prevent the concentration of power in a small number of regulatory agencies. To avoid situations where the supervisory authority has too much power and forces the identity provider to disclose user data, the identity provider should have at least the same level of power as the supervisory authority. Tax issues pose a significant challenge in the field of crypto. This challenge arises from the volatility of crypto assets, the possibility of users holding multiple blockchain accounts, and the difficulty of valuing NFT assets, making it a challenging task to evaluate user assets. The primary objective of this solution is to track the identity of blockchain accounts that may engage in criminal behavior, and it is difficult to deal with the issue of taxation. Tax-related issues can be addressed by tracking non-custodial wallets, centralized exchanges, and other relevant platforms. ## 5 Conclusions

In this paper, we propose an aggregate identity authorization scheme for blockchain wallet accounts. By using the RSA accumulator instead of Merkle tree, this scheme solves the problem that the previously proposed identity management scheme cannot support batch identity authorization certificates, and the new scheme reduces the cost of provers and verifiers. Furthermore, the proposed scheme relieves the burden on VASPs by introducing third-party verifiers and eliminating attribute credentials, making the system more suitable for practical applications. Our solution establishes a permissioned environment between public blockchains and VASPs and contributes to a healthy cryptocurrency industry. In thefuture, we plan to optimize the solution for efficiency and other aspects and develop an example project for demonstration purposes. [PERSON] was the advisor. [PERSON] designed the scheme. [PERSON] carried out the implementation. [PERSON] wrote the manuscript. [PERSON] and [PERSON] revised the final version of the text. All authors have read and agreed to the published version of the manuscript. This research was funded by Postgraduate Research and Practice Innovation Program of Jiangsu Province. Grant number: KYCX21_2832. Not applicable. The authors declare no conflict of interest. The following abbreviations are used in this manuscript: \begin{tabular}{l l} VASP & Virtual asset service provider \\ PoR & Proof of Reserves \\ RSA & Rivest Shamir Adleman \\ ICO & Initial Coin Offering \\ KYC & Know your customer \\ NFT & Non-fungible token \\ FT & Fungible tokens \\ SNARK & Succinct Non-Interactive Argument of Knowledge \\ DID & Decentralized identifier \\ SSI & Self-Sovereign Identity \\ SBT & Soulobound token \\ EVM & Ethereum virtual machine \\ IPFS & InterPlanetary File System \\ SPV & Simplified payment verification \\ P2 PKH & Pay-to-PublicKeyHash \\ OTC & Over-the-counter \\ IDNFT & Identity NFT \\ \end{tabular} 

## References

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