Walmart and Sam’s Club will employ blockchain, the security technology that underpins bitcoin, to halt the spread of E. coli contamination in lettuce.
A CNBC report says the two companies notified lettuce suppliers on Monday that they will be required to upload data about their products to blockchain and achieve “end-to-end traceability” by Sept. 30, 2019.
Part of the motive was an E. coli outbreak in romaine lettuce that affected as many as 200 people. Blockchain would make it easier for suppliers to identify farms where infected produce originated and quickly cut off those supplies to its customers. It should also make it possible to perform the trace in seconds rather than days, Walmart told suppliers.