PRIVACY-FOCUSED REDACTABLE BLOCKCHAIN WITH RESTRICTED ACCESS IN DECENTRALIZED ECOSYSTEMS

PEACE: Privacy-Enhanced Authentication for Cryptocurrency Environments

PEACE is presented, an authentication mechanism for blockchains that combines the practicality of traditional Web systems with decentralization and privacy-preservation, building on a recent groundbreaking zkLogin protocol.

Blockchain-Enabled Identity Systems for Secure e-Governance

Given that digital governance has achieved extensive spread and people rely increasingly on online services, affordable and trustworthy identity management is now one of the core pillars of contemporary e-Governance systems. Conventional identity systems are usually centralized, highly susceptible to cyber-attacks and most likely to breach privacy. Blockchain technology provides a decentralized, tamper-proof, and transparent system, which guarantees data integrity, data security, and the privacy of the user. In this paper, the authors research the adoption of blockchain-based identity management within e-Governance sites. We discuss available solutions, assess the risks along with their weaknesses and strengths, and suggest a design on how to introduce a safe blockchain-based identity system. Important efforts have been on developing a holistic system that brings smart contract, cryptographic protocols and distributed ledger technologies together to make citizen identification and authentication secure. The outcome of the results shows enhanced security, less identity fraud, and better data security, so there is a possibility of scalability and resilient e-Governance applications.

Private Data Collections: Enabling Data Privacy in Permissioned Blockchains

Blockchain Technology for Secure Financial Transactions

Blockchain technology has emerged as a powerful solution for improving the security, transparency, and efficiency of financial transactions. Unlike traditional financial systems that depend on centralized intermediaries, blockchain uses decentralized distributed ledgers, cryptographic security, consensus mechanisms, and immutable records to ensure trust and data integrity. This study examines the role of blockchain in securing financial transactions and explores its core components, including distributed ledgers, cryptographic hashing, consensus protocols, smart contracts, and decentralized networks. The research analyzes how blockchain mitigates security threats such as fraud, double spending, identity theft, unauthorized access, and transaction tampering. It also investigates applications in digital payments, cross-border remittances, banking, trade finance, cryptocurrencies, and decentralized finance (DeFi). A blockchain-enabled financial transaction framework is proposed and evaluated using metrics such as security, transparency, scalability, efficiency, and fraud prevention. The findings indicate that blockchain significantly enhances transaction security and transparency while reducing costs and processing times. Although challenges such as scalability, regulatory issues, interoperability, and energy consumption remain, blockchain demonstrates strong potential to transform modern financial systems and support the development of secure, efficient, and decentralized financial ecosystems.

Efficient privacy preserving cloud data sharing with blockchain-assisted access control and periodic integrity checking

This paper proposes EPPCDS, an efficient privacy-preserving cloud data sharing scheme with blockchain-assisted access control and periodic integrity checking, and demonstrates that it outperforms representative existing schemes in terms of policy creation, policy update, and data access efficiency.

Hybrid Blockchain-Based Tokenization for Secure and Interoperable Electronic Payment Systems

The rapid evolution of digital payment technologies has highlighted critical challenges in ensuring data security, transparency, and compliance across centralized tokenization systems. Traditional models such as those used by EMVCo and major card networks rely on Token Service Providers (TSPs) and token vaults, which, while effective at masking Primary Account Numbers (PANs), still suffer from single points of failure, limited auditability, and potential privacy risks. Fully decentralized blockchain-based payment models, on the other hand, often face latency, scalability, and regulatory compliance challenges that hinder real-world adoption. This paper proposes a blockchain-based distributed tokenization model that decentralizes the tokenization and validation phases while maintaining centralized authorization and settlement through existing ISO 8583 payment rails. Unlike traditional centralized tokenization architectures that rely on a central TSP for token management, and fully decentralized approaches that migrate payment processing onto the blockchain, the proposed model selectively decentralizes token lifecycle functions while preserving compatibility with existing payment infrastructure. The model introduces a two-layer architecture: an on-chain layer for token creation, validation, and consumption using smart contracts deployed on the Ethereum network, and an off-chain layer for detokenization, authorization, and regulatory compliance through the issuer-side Token resolution service (TRS) and Token Vault. Experimental results show a 65–70% reduction in gas consumption and lower transaction latency compared to a fully on-chain reference model. These improvements stem from the model’s hybrid structure, which minimizes state changes and optimizes network resource utilization. The findings indicate that the proposed model enhances security, interoperability, and operational efficiency while supporting regulatory compliance and blockchain-based token lifecycle management within real-time payment workflows, while keeping latency-critical authorization and settlement off-chain.