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Blockchain: protector of cryptocurrencies ... and eggplant

The ledgers are safeguarding the tracking of veggies, drivers, home keys

Sivira's system allows shoppers to use their smartphones to view the path that, say a package of Brussels sprouts, might go through on its way to a Tokyo supermarket.

TOKYO -- The blockchain is said to be bitcoin's big technological innovation. Think of it as a public, digital, ever-growing ledger that tracks all transactions made with the cryptocurrency and, essentially, vouches for the currency. Now the innovation is being adopted by Japanese agriculture and other sectors.

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