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Halal supply chains are vulnerable due to their credence quality attributes, importance of maintaining halal integrity throughout the supply chain, need to avoid doubt, lack of control of food norms, and sensitivity of the Muslim consumer towards halal. These vulnerabilities make halal supply chains complex to design, manage, and optimise. Transparency of halal supply chains is needed in order to ensure trust and authenticity of a halal brand. The principle of a shared database that is safe, open and verifiable without a central operator is an attractive proposition to embed trust and authenticity for halal food, cosmetics, home care, and pharmaceuticals.