Antwort auf: Was ist, wenn beide Schlüssel offengelegt wurden? (Ein- und Ausgang von Ledger)

Try looking at it this way. You need an address to send crypto to, and you also need one to receive crypto.

These are not your keys.

They are temporary. They permit the transaction but do not have any other interaction with your wallet.

They get logged on the blockchain for transaction recording only.

You can use them again, if you wish, but with Bitcoin I generate new ones for every transaction.