How do I move a bitcoin wallet out of Multibit and into Qt ...

Security of Multibit vs bitcoin.qt

I use the bitcoin qt client to send/receive bitcoin payments, but the last time I synced (yesterday), the block chain size has ballooned to 14 GB. I am thinking of using Multibit, but I hear that it is less secure because it does not encrypt your wallet. Is this true? Also, if I really want to use bitcoin qt, is there a way to reduce the application's hard drive footprint?
Thanks in advance!
submitted by moises_ph to BitcoinBeginners [link] [comments]

opening an old wallet.dat

I had about $8 USD worth of bitcoin in a wallet, and I backed up the wallet.dat to my dropbox. According to the modified date of the file this was in April 2013, so it was probaby from bitcoin qt version 0.8.1, or maybe a little earlier.
I basically left it there and haven't done anything with bitcoin since then. Since it is worth probably at least $100 now I decided to check the exact amount.
I downloaded the latest version of bitcoin core, added the wallet.dat file to the data directory, started it with -rescan, and waited almost a month (!) for the blockchain data to get up to date. The balance showed as 0 the whole time. I thought it would update once the blockchain was totally downloaded, but it still just says 0.
Is this a problem with old vs new versions? Did I do something wrong? Next time, should I expect the balance to show a non-zero amount even if I haven't downloaded the whole blockchain yet?
Update: ok, I feel kind of dumb, turns out the transaction was made in a multibit wallet, not a bitcoin qt wallet, but I still have a copy of that too. I opened the wallet in the latest version of multibit classic, and it has the receiving address in question, and checking the address on I can see that it received the transaction... but the transaction and the balance both don't show in the program. I wonder if I need the same multibit version I had before? the transaction was made in feb 2014
Update 2: was able to use the private key to sweep the balance into electrum
submitted by valanbrown to Bitcoin [link] [comments]

Are we overlooking pgp verification of wallet installation files?

I am curious how many people use pgp to verify the new version of their favorite wallet software every time a new version comes out? To me it seems like pgp verification isn't taken very seriously. Most, but not all vendors will put out new pgp signature files with each new release however if you are relatively unaware of security this could mean you are unknowingly missing a very important step. Importing the authors pgp key, downloading the associated signature file and then verifying the executable isn't very obvious to those who aren't security savvy. However it is an obvious security hole and a potential honeypot for anyone looking for some easy coin. One thing I find disturbing is how few of the major wallet developers put any significant effort into educating their users on the first step of securing their hot wallet. Multibit and armory are the only two clients I know of that give any information on pgp verification, but even multibit misses this important step on their "How to install" page. Electrum doesn't even provide a signature file for their linux version instead providing a hyperlink with an md5 hash appended to it. Bitcoin-qt from what I can tell only provides sha256 hashes of their files with zero instruction on how to use them. To me it seems like the pgp step of securing a wallet is looked at as the boring minor tidbit that you have to have that nobody really wants to put time into resulting in most vendors throwing up some hashes/signatures with little to no information on how to use them. I think that all vendors should have a section with instructions on how to verify their software, put this as the second step in getting started with their software right after the download step and make sure to provide pgp signatures for each installer package and not just hashes. For me, not being a security expert, I feel much safer verifying a pgp signature vs checking that a hash matches. With bitcoins being targeted on a daily basis through incredibly creative means this seems to me like a giant gaping hole that could be fought with a very small amount of education. Just a thought.
Edit: because I suck at the grammar Edit: after digging around I found the electrum signature files for linux. There is no direct link to the page from their website but they can be found here:
submitted by bitmagi to Bitcoin [link] [comments] Poradnik #2 : Instalacja klienta Multibit Bitcoin Wallets: Core vs Multibit How to Back Up Your Bitcoin Wallet Guide To Bitcoin Mining [VB.NET] Cryptocurrency Wallet stealer tutorial {MultiBit}

It is a good idea to be security conscious with Bitcoin software - the question to ask is: How can rogue code get to run on my machine ? If you download MultiBit from (and check its SHA256 hash and/or signature) and download the JDK from a reputable source then you know what you are running. Video covering a comparison of MultiBit HD vs Bitcoin Core (was QT) vs has ShapeShift There are several Bitcoin Lagir Zala Ji wallets for Mac that you can choose from. Latest price chartsHow To Use Rbf In Electrum How To Get Bch From Blockchaininfo . Bitcoin-QT: Very long startup and at first launch needs to download the entire blockchain Multibit: Starts up in a few seconds and downloads for only a few seconds Why is Bitcoin-QT so slow? Desktop Wallets: MultiBit vs Bitcoin QT vs Electrum. For storing Bitcoin you need a wallet. A “wallet” is the Bitcoin equivalent of a bank account. It allows you to receive Bitcoin, store them, and then send them to others. Armory vs MultiBit (self.Bitcoin) submitted 5 years ago * by jack_nz. ... bitcoin-qt is needed and used for the entire interaction between Armory and the blockchain. This way Armory 'outsources' all the security of the reference client regarding interactions with the blockchain. Bitcoin-qt doesn't make your computer a miner.

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