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Sweeping involves importing a private key, then sending it's entire balance to a new address in your wallet via a new transaction. This would protect your paper wallet's bitcoins from being stolen if someone else ever had access to your paper wallet, or obtains access to your paper wallet in the future.
I'd love to know all the nitty-gritty steps involved with Bitcoin-Qt.
The functionality certainly exists. – Nate Eldredge – 2014-05-19T16:09:47.573
There is no sweep function in Bitcoin Core. – user13413 – 2014-05-19T23:33:28.900
You can certainly send your entire balance to a new address. It can't watch for future incoming transactions on that address and automatically resend them somewhere else, but that doesn't seem to be the sense of "sweep" that the OP is asking for. – Nate Eldredge – 2014-05-19T23:48:34.820
Doing it manually is not a function of the client. I can say that raw transactions let me make a transaction only spendable with a hash collision, but it is not a function of the client. You can approximate a private key sweep with a transaction.. but it's not a function of the client. See what I'm saying here? Bitcoin core does not have private key sweeping capability, it's not a function of the client. – user13413 – 2014-05-20T01:07:39.993
I understood the question to be asking for the specific instructions on how to, in your words, "approximate" this feature. If I get a chance I will try to add an answer along those lines. – Nate Eldredge – 2014-05-20T01:51:32.770
@NateEldredge yes that's what I'm looking for. Instructions on importing a private into Bitcoin Core already exist, I'd like an augmented version with the commands that would send the private key's balance to a new address.
– Brother Bitcoin – 2014-05-20T16:01:05.290