What differentiates KeepKey from a USB drive or other external storage device?

When you insert a USB drive or memory card into a computer, the computer can immediately access everything stored on it. KeepKey communicates with a connected computer using a limited protocol, and KeepKey never reveals its private key. This limited protocol only allows for transaction requests, which must be manually approved using the device’s confirmation button before KeepKey will sign it.

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