DefinePK

Abstract

Blockchain technology offers a massive network with built-in security features that encompass cryptography, decentralization, and consensus, which foster trust in transactions. IoT further looks as an emerging in finance and security that are the application of blockchain. The basic need for every blockchain consumer is the first to prioritize data confidentiality, integrity, and availability. In the era of 2025, trust is a necessary part of security for third parties, which handle the privileges of private and public.  The mentioned advantages and disadvantages motivated us to provide an advancement and comprehensive study regarding the applicability of blockchain technology. This paper focuses on blockchain security issues for blockchain and sorts out the security risks in six layers of blockchain technology by comparing and analyzing existing security measures. The text also investigates and describes various security threats and obstacles associated with implementing blockchain technology, fostering theoretical inquiry and the creation of strong security protocols in current and forthcoming distributed work settings.