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End-to-end encryption and internode functions look very promising which can help the Zencash network to stay healthy over potential attacks, and help their customers to keep their money safely online in the network. Due to amazing features of those two, Zencash customers don't need to have cold wallets to ensure their coins stored safely. Of course, they can do it for sure if they want, but it's not mandatory.
Thank you for great features, Medaar.
