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This study proposes a sustainable blockchain framework for the halal food supply chain. As is widely acknowledged, blockchain could enhance supply chain integrity, but its impacts on the halal food supply chain are unknown. Disruptive technologies for Industry 4.0 can improve transparency, which is desperately needed in the food supply chain; however, various challenges are also incurred. Based on five in-depth halal food supply chain case studies, this paper reveals a practical framework for overcoming the challenges faced by the halal food supply chain pertaining to blockchain implementation. The framework comprises five key challenges that are vital to small and medium enterprises in halal food supply chain blockchain implementation. The findings also indicate that the halal food supply chain can gain a congruent and fresh perspective in inducing or superseding blockchain technology. In addition, the …