Wal-Mart Stores Inc., the world’s largest retailer, was one of the first to get on board, just completing a trial using blockchain technology to track pork in China, where it has more than 400 stores. The time taken to track the meat’s supply chain was cut from 26 hours to just seconds using blockchain, and the scope of the project is being widened to other products, said Frank Yiannas, Wal-Mart’s vice president for food safety, in an interview Thursday.

“The problem is the data is only as reliable as the person providing the data,” said Weinberg, who recalls seeing everything in China from synthetic eggs to fake shrimp that still sizzle in a wok. “In most supply chains there is one or more ‘unreliable’ data provider. This means blockchain is likely useless for protecting against food-fraud unless every piece of data is scrutinized to be accurate.”

But blockchain is “light years” away from the system used by the global food industry today, which relies heavily on paper records, said Yiannas, Wal-Mart’s food safety chief. By recording the identity of those who input data into the chain, the technology removes the anonymity that has helped food-fraud to thrive, he said.

The role of humans in recording the supply chain will also diminish, said Yiannas. “More and more of these documents will eventually be captured in an automated way.”

Source: Inside the Secret World of Global Food Spies – Bloomberg

Thanks Frederic