Blockchain technology has gained significant attention as a secure and transparent method for recording transactions across various industries. This study explores the role of blockchain in ensuring secure transactions through its decentralized and immutable structure. It examines different types of blockchain—public, private, and hybrid—and their applications in transaction security. Key security mechanisms such as encryption, tokenization, and authentication are discussed to highlight how blockchain enhances data integrity and trust. The study aims to answer whether blockchain can create a reliable and efficient secure transaction scheme (Lin & Liao, 2017; Zheng et al., 2018)