6) the laptop is kept powered off except for the once a month or so when
someone comes in, powers it on, and uses it to transfer bitcoins from
the wallet. (The wallet does *NOT* need to be online for the bitcoins to
be collected by the account. The wallet only needs to be internet
connected to send money from the account).
Technically wherever the private key resides never needs to be internet
connected.
This is the idea of the offline wallet. (attend my bsides talk for more).
This is also related to what people are talking about when they refer to
"cold" vs "hot" wallets.
You can do this with Armoury for example.
User with access signs a message with the private key authorizing a
transfer. Offline wallet doesn't even need to have a copy of the
blockchain to know if such a transaction is possible. User brings with
them their own knowledge of this.
Signed transaction is typically carried off with a flash drive to an
internet connected machine to pick it up and distribute it to the network.
For a place having people doing this all the time throughout the day
(like a big exchange with a cold and hot wallet and an operator bridging
them and using their judgment), I think a sensible architechure would be
to have a 1 way RS-232 link where the cold machine can output the signed
transaction to be read by the hot machine. No flash drives required.
But I still say, with only 5.666 GH/s of mining power here at
Skullspace, which caluculator sites tell me should yield 0.0151 per day
(0.453 per month) (and fast declining) that none of this effort is worth it.
Let's see if the current price rally continues all the way up to
sell-off this this upcoming Saturday...
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