Understanding the importance of backups, she created an encrypted wallet backup long ago and stored it in a safe place. On the other hand, without understanding change addresses, Alice would likely be very confused about what happened to the missing 1 BTC. Prevention: Count the number of manually-created addresses and spending transactions since your last backup. Privacy depends on the strict separation between addresses and personal identities, a model referred to as pseudonymity. But Carlos had a problem: he needed to get his paper wallet into a software wallet to pay Overstock.
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The same mistake could happen again. An example is the now-unsupported. Alice may not re-spend the 10 BTC. Any observer capable of linking Bitcoin addresses to personal identities can begin to draw conclusions about money transfers between people. Carlos was worried about leaving any trace of his private key on his computer, so he securely deleted MultiBit and its data directory.