This research explores the application of blockchain technology to enhance online business security. Online businesses face significant threats from cyberattacks, data theft, and information leaks, which compromise customer trust and digital assets. Blockchain technology offers a decentralized, secure, and transparent solution through its ability to ensure data integrity, prevent data manipulation, and provide an immutable record of transactions. The study combines a literature review of existing security frameworks with an analysis of potential vulnerabilities. A blockchain-based solution was then designed and implemented to mitigate these risks. Security attack simulations and system reliability testing were used to evaluate the effectiveness of the solution. The results show that blockchain significantly improves online business security, reduces data theft risks, and enhances transparency. The research concludes that blockchain can be an effective tool for addressing online business security challenges. It also highlights the importance of integrating blockchain into digital business practices to improve security and adaptability in the evolving digital landscape. The study emphasizes the need for further research and scalable implementation of blockchain solutions in online business security. Additionally, the research discusses the importance of education and curriculum design in preparing students for the challenges of digital business, emphasizing the role of Lean Startup methodology in fostering innovation and entrepreneurship. The findings suggest that a student-centered, flexible curriculum that incorporates real-world projects and industry collaboration is essential for developing the skills needed in the digital economy. The research also underscores the importance of collaboration between educational institutions and industry to ensure that curricula remain relevant and future-oriented. Overall, the study provides valuable insights into the potential of blockchain technology in enhancing online business security and the importance of adapting educational practices to meet the demands of the digital era.This research explores the application of blockchain technology to enhance online business security. Online businesses face significant threats from cyberattacks, data theft, and information leaks, which compromise customer trust and digital assets. Blockchain technology offers a decentralized, secure, and transparent solution through its ability to ensure data integrity, prevent data manipulation, and provide an immutable record of transactions. The study combines a literature review of existing security frameworks with an analysis of potential vulnerabilities. A blockchain-based solution was then designed and implemented to mitigate these risks. Security attack simulations and system reliability testing were used to evaluate the effectiveness of the solution. The results show that blockchain significantly improves online business security, reduces data theft risks, and enhances transparency. The research concludes that blockchain can be an effective tool for addressing online business security challenges. It also highlights the importance of integrating blockchain into digital business practices to improve security and adaptability in the evolving digital landscape. The study emphasizes the need for further research and scalable implementation of blockchain solutions in online business security. Additionally, the research discusses the importance of education and curriculum design in preparing students for the challenges of digital business, emphasizing the role of Lean Startup methodology in fostering innovation and entrepreneurship. The findings suggest that a student-centered, flexible curriculum that incorporates real-world projects and industry collaboration is essential for developing the skills needed in the digital economy. The research also underscores the importance of collaboration between educational institutions and industry to ensure that curricula remain relevant and future-oriented. Overall, the study provides valuable insights into the potential of blockchain technology in enhancing online business security and the importance of adapting educational practices to meet the demands of the digital era.