<![CDATA[[Design and Development of a Wholesale Sales Website with Random CAPTCHA Optimization and Google OAuth Integration] The development of information technology, especially the internet, has significantly impacted business activities, including the trade sector. Berkah Dua Saudara Wholesale Store still uses conventional sales and promotion methods, resulting in limited marketing reach and inefficient transaction processes, particularly for customers located far from the store. In addition, the lack of adequate security systems poses risks of unauthorized access. This study aims to design and develop a web-based wholesale sales information system capable of managing online transactions and promotions. The system implements Random CAPTCHA to prevent bot attacks and Google OAuth as a secure and efficient authentication method. The research method includes literature study, system design, implementation, and testing using Black Box Testing. The results show that the system improves transaction efficiency, expands marketing reach, and enhances system security.]]>
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