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The push of Walmart gives legitimacy to much publicized technologies

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After an E. coli outbreak in Romaine lettuce made more than 200 people sick in April, Walmart defined a new stringent policy for its salad-based suppliers.

"All green leafy vegetable suppliers should be able to track their products on farms (according to production batch) in seconds, not days," the company said in a letter last week.

To do this, Walmart has introduced a new system for its suppliers that is powered by a highly publicized technology – blockchain.

"Today, Walmart and Sam & # 39; s Club have sent a letter to suppliers of fresh and leafy vegetables asking them to trace their products back to the farm using blockchain technology." Walmart stated in a press release. "The suppliers are expected to have all these systems within the next year".

Blockchain is a technology in which each computer contributes to a shared public ledger, allowing automated systems to function without a central authority. Blockchain technology is best known as the basis of bitcoin, the cryptocurrency that has undergone unexpected wild oscillations.

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