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QuadrigaCX Owes Customers $190 Million, Court Filing Shows - CoinDesk

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She added that Cotten held “sole responsibility for handling the funds and coins,” and the remaining team members have had no luck accessing the exchange’s cold wallets since.

From QuadrigaCX Owes Customers $190 Million, Court Filing Shows - CoinDesk.

Cold wallets, as I was just reading in a new book “Blockchain and Decentralised Systems” by Pavel Kravchenko (et al),

A cold wallet is a digital wallet where private keys are stored and processed only on devices that do not have the ability to directly connect to the global internet.

A simple example of deep cold storage is opening a safe deposit box and putting a USB stick containing an encrypted wallet file in it. The public (sending) addresses can be used any time to send additional bitcoins to the wallet, but spending the bitcoins would require physical access to the box (in addition to knowledge of the encryption password).

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