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Bitcoin-Qt is getting require large and is taking up over 10% of the space on my little laptop. Looking for an alternative, I saw Electrum. I downloaded the app and I'm able to connect to a server, but I'm wondering: what would the security implications be of not connecting to your own server?

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    I like to know what are the security implication of hosting your own server :-)
    – barrymac
    Mar 6, 2013 at 13:36
  • Yeah, that's a good follow up question. You should ask it, and link it here! Mar 7, 2013 at 7:35
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    good idea, done: Vice Versa
    – barrymac
    Mar 7, 2013 at 15:49
  • @barrymac Nothing, unless there's a security issue in Electrum.
    – Nick ODell
    Mar 7, 2013 at 18:07

2 Answers 2

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A dishonest server could lie to you about how many bitcoins you have.

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  • Don't all the Electrum servers connect to each other, so you can connect to any of them? If so, wouldn't they all hold the same information about your account? Mar 7, 2013 at 7:34
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    All of the honest servers will tell you the same thing. But a dishonest server could lie.
    – Nick ODell
    Mar 7, 2013 at 7:48
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    This is not correct, they can give you false low wallet balances, but not falsely high ones.
    – Claris
    May 4, 2015 at 3:47
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    @bitcoin sure it could - by not telling you about a transaction that spends one of your outputs.
    – Nick ODell
    May 4, 2015 at 4:05
  • @NickODell are you sure about this? what you describe would be a client that fully trusts the server, however according to this talk from the author of Electrum (youtu.be/hjYCXOyDy7Y?t=718 <- exact moment) it says that Electrum is one level above the "server-trusting" wallets, that is, it's a SPV wallet; if this is still the case nowadays, I wonder what's the difference between this and a "server-trusting" wallet? Jan 17, 2018 at 16:10
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They'll be able to track your transactions/addresses and tie them to your IP address, although this is mitigated if you are using proxies (you can also go through Tor).

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