You'll want to configure the Bitcoin-QT client to run over Tor, otherwise it could list your IP address as the "Relayed by IP" in the block chain. So if you're sending coins directly from your client to SR, you could be deanonymized. Take a look at any random transaction and you'll the relayed by IP https://blockchain.info/tx/95855cbb856458834fb26d948cd8a5b8bf2644ce829a0a77d128c5aced5df30b/95855cbb856458834fb26d948cd8a5b8bf2644ce829a0a77d128c5aced5df30b Honestly, if you've never used bitcoin before, I suggest using an ewallet like the one that blockchain.info offers. With the standard client, you need to download the entire block chain before you can use it, plus the index file, and that's like 4 GB of data and rapidly increasing.