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Performance evaluation of a lightweight consensus protocol for blockchain in IoT networks.

Kaur Manpreet, Gupta Shikha

Computer Science

2025

T. 26 (1)

27--47

The consensus protocol is essential in practically every blockchain application. Most of these existing blockchain consensus protocols need massive computa-tional capabilities, substantial energy consumption, and dependency on monetary stakes. These shortcomings in the mainstream consensus approach leadto their unsuitability for low-resource applications like IoT. As a result of thiswork, a lightweight consensus process referred as Delegated Proof of Accessibility (DPoAC) is implemented and evaluated. DPoAC makes use of Shamir secretsharing, Proof of Stake (PoS) with random selection, and the Inter-PlanetaryFile System (IPFS). The DPoAC operation is composed of four modules: secret generation and distribution, retrieval of secret shares, block creation and verification, and block rewards and penalty. A detailed description of DPoAChas been provided and implemented in JavaScript and experimental resultsdemonstrate that our solution meets the necessary performance and securityrequirements for a lightweight scalable protocol for IoT systems.

A proposal of digital contents copyright protection by using blockmarking technique

Tai Le Danh, Thanh Ta Minh

Computer Science

2024

T. 25 (4)

621--636

Recently, Blockmarking technique [15] is proposed for a new hybrid model based on the combination of blockchain and watermarking method. In this model, it not only achieves the goal of image copyright protection but also stores the image into the blockchain network such as IPFS system. In this paper, we propose a new DRM system by inheriting the idea of Blockmarking. The copyright contents can be distributed via IPFS blockchain, then be restored by using the reconstruction license for each legal user. Also, in our method, based on the reconstruction licenses, the distributed contents can be reconstructed from IPFS with various watermarking patterns. It helps us can manage the legal users and trace the traitor if a dispute occurs. The experimental results show that our method successfully achieved the purpose of digital copyright protection.