Bitcoin Bitcoin by Tiger Pixel Follow Tiger Pixel on ...

My friend made this shirt and I told him I had to have one. Pixel Bitcoins /r/btc

My friend made this shirt and I told him I had to have one. Pixel Bitcoins /btc submitted by BitcoinAllBot to BitcoinAll [link] [comments]

My friend made this shirt and I told him I had to have one. Pixel Bitcoins! /r/Bitcoin

My friend made this shirt and I told him I had to have one. Pixel Bitcoins! /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

[uncensored-r/Bitcoin] Pixelated Bitcoins on a Shirt

The following post by bitcoinbabyshirts is being replicated because the post has been silently greylisted.
The original post can be found(in censored form) at this link:
np.reddit.com/ Bitcoin/comments/73fohl
The original post's content was as follows:
https://i.redd.it/phugm4yxl1pz.png
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

Pixelated Bitcoin Logo Gets Painted on the R/Place Canvas Experiment

Pixelated Bitcoin Logo Gets Painted on the Place Canvas Experiment submitted by CryptoCurrencyNews to CryptoCurrency [link] [comments]

Pixelated Bitcoin Logo Gets Painted on the R/Place Canvas Experiment

Pixelated Bitcoin Logo Gets Painted on the Place Canvas Experiment submitted by BitcoinAllBot to BitcoinAll [link] [comments]

In the news • Pixelated Bitcoin Logo Gets Painted on the R/Place Canvas Experiment

submitted by btcforumbot to BtcForum [link] [comments]

Building a pixel art Bitcoin tracker

submitted by rdude to programming [link] [comments]

Pixel Art - animated Bitcoin mega-meme short - trippy and fun [1,036 views]

Pixel Art - animated Bitcoin mega-meme short - trippy and fun [1,036 views] submitted by Adama_Now to unknownvideos [link] [comments]

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4" x 35.4" on canvas

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4 submitted by YoulDesign to Bitcoin [link] [comments]

[Andreas puts congressman on blast with pic of kittens that is $100m bitcoin transaction steganographic. Ban pictures senator.]

Andreas puts congressman on blast with pic of kittens that is $100m bitcoin transaction steganographic. Ban pictures senator.
JK it's old, but still, point holds
This is the transaction encoded within: https://blockchain.info/tx/29a3efd3ef04f9153d47a990bd7b048a4b2d213daaa5fb8ed670fb85f13bdbcf
It uses the outguess steganographic algo, no password
about 500 bytes of transaction data encoded in minute variations of color in the pixels.
Bitcoin banned bans from working.
https://twitter.com/aantonop/status/667365048507957248/photo/1?ref_src=twsrc^tfw|twcamp^tweetembed|twterm^667365048507957248
submitted by MakeTotalDestr0i to Bitcoin [link] [comments]

Experience Instant Bitcoin Micropayment through Lightning Network, 1 Satoshi for Painting 1 Pixel, Satoshi's Place - An Online Collaborative Artboard with 1,000,000 Pixels

Experience Instant Bitcoin Micropayment through Lightning Network, 1 Satoshi for Painting 1 Pixel, Satoshi's Place - An Online Collaborative Artboard with 1,000,000 Pixels submitted by dapp_com to Bitcoin [link] [comments]

Experience Instant Bitcoin Micropayment through Lightning Network, 1 Satoshi for Painting 1 Pixel, Satoshi's Place - An Online Collaborative Artboard with 1,000,000 Pixels

Experience Instant Bitcoin Micropayment through Lightning Network, 1 Satoshi for Painting 1 Pixel, Satoshi's Place - An Online Collaborative Artboard with 1,000,000 Pixels submitted by dapp_com to lightningnetwork [link] [comments]

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4" x 35.4" on canvas (x-post from /r/Bitcoin)

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4 submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4" x 35.4" on canvas (x-post from /r/Bitcoin)

Physical pixel art of a Bitcoin logo made of 1521 spraypaint nozzle ! 35.4 submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Lore v2 QT on Raspberry Pi

Hello,
 
To follow up to mindphuk's excellent piece on building the headless client on Raspberry Pi (https://www.reddit.com/blackcoin/comments/6gkjrw/wip_blackpi_a_stake_device_based_on_raspberry/), I thought if anyone was interested I'd show you how to get the full QT version running on the Pi on the Jessie with Pixel desktop. This works and has been soak tested for several days now on a standard Raspberry Pi 3. I have since added some coins and it stakes a handful of times a day.
 
Running staking Lore clients paves the way for some of the future use cases of BLK utilising the Bitcoin 0.12 (and newer) core tech, including colored coins. So I'm going to leave this one going indefinitely to kickstart the number of Lore clients staking. It's certainly not mandatory but it will be good in the longer term to have a nice distribution of Lore staking clients.
 
The cross-compile which lets you create binaries for multiple platforms didn't work for the QT version on the Pi, so there is more to do than just running the binary unfortunately, as below. There are folks working on some much cleaner solutions than this for the Pi, with a custom front end, and where you won't have to do any mucking about. That is coming soon. In the meantime, if you enjoy a fiddle with such things, here's how to get this QT client working on your Pi.
 
These instructions assume you are starting from scratch with a completely blank OS.
 
Download Jessie with Pixel from: http://downloads.raspberrypi.org/raspbian/images/raspbian-2017-07-05/2017-07-05-raspbian-jessie.zip
 
Note they have since (August 2017) released a version called 'Stretch' which does not work with this guide. I'll see if I can come up with something new for that at some point and link to it here when I have. In the meantime the guide should work with the Jessie image above.
 
Unzip the file and extract the .img file to burn it onto Fresh SD card to boot from (to be safe, use 16GB or larger), using a tool like win32diskimager or Etcher.
 
Assuming you have keyboard/mouse and monitor plugged into your pi, boot it up and the Jessie Desktop will show.
 
Before we do anything else, you should increase the default swap size on the pi, as compiling certain libraries can exhaust the RAM and get stuck otherwise. To do this, launch a Terminal window and type:
 
sudo nano /etc/dphys-swapfile 
 
and Change the CONF_SWAPSIZE from 100 to:
 
CONF_SWAPSIZE=1024 
 
Exit nano with control + x to write out the file.
 
Then, run the following to restart the swapfile manager:
 
sudo /etc/init.d/dphys-swapfile stop sudo /etc/init.d/dphys-swapfile start 
 
Now, launch the browser and download the Lore 2.12 binaries for ARM here: https://mega.nz/#!k2InxZhb!iaLhUPreA7LZqZ-Az-0StRBUshSJ82XjldPsvhGBBH4 (Version with fee fix from 6 September 2017)
 
(If you prefer to compile it yourself instead, it is possible by following the instructions in the original article by Mindphuk just taking into account this is the newer version of the Lore client than when that was written (https://github.com/janko33bd/bitcoin/releases) and the versions of Boost and the Berkeley DB need to be the same as below.)
 
Double click the zip and extract the Lore binary files. Yes, at the moment they are all called 'bitcoin', not 'blackcoin' or 'Lore' - this is because the code derives from a recent bitcoin core implementation so this has not yet been updated. You can place these wherever you like.
 
In the Terminal window, change directory to where you put the binaries, e.g.:
 
cd Downloads/lore-raspberrypi-armv7-jessie-pixel chmod +x * 
 
That marks the binaries as executable.
 
Now, we need the Boost libraries installed for any of the Lore binaries to work. The project was done with Boost 1.62.0. Unfortunately the Jessie repository only goes up to 1.55, so we need to download and build 1.62 manually on the device.
wget https://sourceforge.net/projects/boost/files/boost/1.62.0/boost_1_62_0.tar.gz/download tar -xvzf download cd boost_1_62_0 sudo ./bootstrap.sh sudo ./b2 install 
 
(This will take almost 2 hours. Have a nice cup of tea and a sit down.)
 
When I came to run the binaries, I found they couldn't find Boost. Running this command fixes that:
sudo ldconfig 
 
Now we are going to install the packages which aren't already included in the default OS installation which the binaries need in order to run:
sudo apt-get install qrencode libprotobuf-dev libevent-pthreads-2.0-5 
 
Now we need to install the Berkeley Database version 6.2.23. This is the version Lore v2 uses. Bitcoin still uses 4.8 which is 10 years old! This doesn't take too long.
wget http://download.oracle.com/berkeley-db/db-6.2.23.tar.gz tar -xvzf db-6.2.23.tar.gz cd db-6.2.23/build_unix ../dist/configure --prefix=/usr --enable-compat185 --enable-dbm --disable-static --enable-cxx 
 
I find this next section of the Berkeley instructions worked better just switching to root, which can be fudged by running sudo su before the rest:
sudo su make make docdir=/usshare/doc/db-6.2.23 install chown -v -R root:root /usbin/db_* /usinclude/db{,_185,_cxx}.h /uslib/libdb*.{so,la} /usshare/doc/db-6.2.23 
 
Now we're going to go up a couple of directories to where the binaries were:
cd ../.. 
 
Then run the client!
./bitcoin-qt 
 
And there you have it. Should hopefully end up looking a bit like this: http://imgur.com/a/eEHGa
 
Using the Bootstrap can save a while syncing. Download it at: https://www.reddit.com/blackcoin/comments/6b3imq/blackcoin_bootstrapdat_up_to_block_1631800
 
Place the bootstrap.dat file into the ~/.lore directory.
 
Run ./bitcoin-qt again, it will say 'Importing Blocks' rather than 'Synchronising with Network'. My pi sync'ed fully in about 5-6 hours.
 
If you want peace of mind that Lore will always start on bootup into the Jessie w/Pixel desktop (i.e. after a power cycle), then you need to create a .desktop file in the following place.
sudo nano ~/.config/autostart/Lore.desktop 
 
And in it, enter the following (tailoring the Exec line below to the whereabouts of your bitcoin-qt file):
[Desktop Entry] Name=Blackcoin Lore Comment=Mining without the waste Exec=/home/pi/Downloads/lore-raspberrypi-armv7-jessie-pixel/bitcoin-qt Type=Application Encoding=UTF-8 Terminal=false Categories=None; 
 
Power usage and payback time
 
After a good while leaving it going by itself, the CPU load averages got down to almost zero, all of the time. Idling, the Pi uses a bit less than 3 watts. This means it would take two weeks to use one 1Kw/h of electricity.
 
If you pay e.g. 12.5 cents a unit, that's what you'd expect this to cost to run in a fortnight. That's around $0.25 a month or $3 a year. Green and cheap and helping to secure the BLK network. I paid for the year's worth of electricity in 2 days staking with 25k BLK. Makes mining look silly, huh? ;)
 
Securing your Pi
 
With staking, your wallet needs to be unlocked and as such, the keys to your wallet are on the device. In a clean and newly installed environment as described above, and if you don't allow others to use your device and there is no other software or nasties running on it, there is no real cause for concern. However, there are some basic security precautions you can take.
 
Firstly, if you have enabled SSH and are playing with your pi across your LAN (or worse, the Internet), you should immediately change the password for the default 'pi' user (which is preconfigured to be 'raspberry'). Simply log in as normal, then type:
 
passwd 
 
You'll be prompted to enter the old and the new passwords.
 
Security by default
 
Your Pi is likely, by default, to not be exposed to incoming connections from the outside world because your router is likely generating a private address range for your LAN (192.168.x.x or 10.0.x.x or 172.x.x.x) which means all incoming connections are effectively blocked at the router anyway unless you set up a 'port forward' record to allow packets arriving on certain ports to be forwarded to a specific internal IP address.
 
As for accessing your Pi across the internet, if you have set up a port forward, this likely has security ramifications. Even basic old fashioned protocols have proven in recent times to have uncaught flaws, so it's always advisable to lock down your device as much as possible, and even if you only plan to access the Pi over your LAN, install a firewall to configure this. I used one called ufw, because it's literally an uncomplicated firewall.
 
sudo apt-get install ufw sudo ufw allow from 192.168.0.0/16 to any port 22 sudo ufw --force enable 
 
This allows just port 22 (SSH) to be open on the Pi to any device on my LAN's subnet (192.168.0.x). You can change the above to a single IP address if paranoid, or add several lines, if you want to lock it down to your LAN and a specific external static IP address (e.g. a VPN service you use). To find out what subnet your router uses, just type:
 
ifconfig 
 
and you'll see on the interface you are using (either hard wired or wifi) the 192.168 or 10. or 172. prefix. Change the above rule so it matches the first two octets correctly (e.g. 10.0.0.0/16 if you're on a 10.0. address).
 
You may already use VNC to access your Pi's desktop across your LAN, this uses port 5900. Add a line like above to lock it down to an internal address. It's not a good idea to expose this port to the wider world because those connections are not encrypted and potentially could be subjected to a MITM attack.
 
You can query the status of the firewall like this:
ufw status 
 
And of course, try connecting remotely once you change the rules to see what works. You should consult the official documentation for further options: https://help.ubuntu.com/community/UFW
 
Back up & Recovery
 
There are again many ways to tackle this so I'll just speak about my basic precautions in this regard. Don't take it as a be-all-and-end-all!
 
The wallet.dat file is the key file (literally) containing all the private/public keys and transactions. This can be found in:
 
~/.lore 
 
You can navigate there using Jessie w/Pixel's own file manager or in a terminal window (cd ~/.lore). You can copy this file or, if you'd rather keep a plain text file of all your public and private keys, use the 'dumpwallet' command in the console. In Lore, go to Help > Debug Window > Console and type 'dumpwallet myfilename' where myfilename is the file you want it to spit out with all your keys in it. This file will end up in the same place you launch bitcoin-qt from.
 
The instructions earlier on, when running Lore for the first time intentionally left out encrypting your wallet.dat file because in order for the wallet to stake upon startup, it needs to have a decrypted key already. This isn't perfect, but after a power cycle, it would never stake unless you left it decrypted. So the best practice here is as soon as the wallet.dat file has left your device, i.e. you copy it to a USB stick for example, put it in an encrypted folder or drive (or both).
 
In Windows, one way is to use Bitlocker drive encryption for the entire drive. You should follow the instructions here to encrypt your flash drive before your wallet.dat is on there, and don't forget the password!!
http://infosec.nmsu.edu/instructions-guides/how-to-enable-bitlocker-to-go-for-external-hard-drives-and-usb-flash-drives/
 
On the Mac, I use a software package called Concealer to encrypt files I store on the Mac itself: http://www.belightsoft.com/products/conceale   There are almost certainly free packages with similar functionality, I have just used that one for years.
 
Either way, if you want to just make sure your USB drive is encrypted, you can do so in one-click in Finder before you put the sensitive files on it: http://lifehacker.com/encrypt-a-usb-stick-in-finder-with-a-click-1594798016
 
Note that these disk encryption methods may mean having to access the USB stick on a PC or Mac in order to retrieve the files in the event of a disaster. Be aware this may mean exposing them to more security issues if your computer is in any way compromised or someone nefarious has access to your computer. There are more 'manual' ways of backing up and recovering, such as literally writing down private/public key pairs which this guide doesn't go into, but may suit you better if paranoid about your setup.
 
Recovery
 
The wallet.dat file has everything in it you need to recover your wallet, or if you used 'dumpwallet', the file you saved out has all the keys.
 
Wallet.dat method: Install Lore as normal then replace any auto-generated wallet.dat in ~/.lore directory with your backup. If a lot of time has elapsed and many transactions have occurred since your backup, launch lore with:
./bitcoin-qt -rescan 
 
And if that doesn't do the job, do a full reindex of the blockchain:
 
./bitcoin-qt -reindex 
 
If you used the dumpwallet command, install Lore then place the file containing all the keys that you saved out in the same directory as bitcoin-qt. In Lore, go to Help > Debug Window > Console and type 'importwallet myfilename' where myfilename is that file containing all the keys. The wallet should automatically rescan for transactions at that point and you should be good to go.
 
There are a million ways to do effective security and disaster recovery, but I hope this shows you a couple of basic precautionary ways. There are discussions about better ways to stake without compromising too much security which are happening all the time and developments in this regard will happen in time.
 
In the meantime, feel free to comment with your best practices.
 
submitted by patcrypt to blackcoin [link] [comments]

PixelPortfolio app turns your Bitcoin portfolio into retro pixel art

submitted by DecryptMedia to Bitcoin [link] [comments]

PixelPortfolio app turns your Bitcoin portfolio into retro pixel art

PixelPortfolio app turns your Bitcoin portfolio into retro pixel art submitted by serenity2021 to ethtrader [link] [comments]

03-10 08:08 - 'fit-deg1-rise-fitted.png 1,200×700 pixels' (ic.unicamp.br) by /u/sfasiangirl removed from /r/Bitcoin within 653-663min

fit-deg1-rise-fitted.png 1,200×700 pixels
Go1dfish undelete link
unreddit undelete link
Author: sfasiangirl
submitted by removalbot to removalbot [link] [comments]

8-bit pixel art cryptocurrency Bitcoin mining scene w/ ASIC and GPU miners along with a real-life Dogecoin -- VoskCoin YouTube

8-bit pixel art cryptocurrency Bitcoin mining scene w/ ASIC and GPU miners along with a real-life Dogecoin -- VoskCoin YouTube submitted by VoskCoin to VoskCoin [link] [comments]

Is *r/Bitcoin* welcoming to women?

Guys......guys,....after the recent post:
http://www.reddit.com/Bitcoin/comments/292e64/is_bitcoin_welcoming_to_women/
and subsequent:
http://np.reddit.com/Buttcoin/comments/292s8f/is_bitcoin_welcoming_to_women_lets_have_the/
I think I can identify part of the problem here:
Listen, buttcoiners bitcoiners, it's your choice....Thankyou for all your coding, but women are not pixelated. Bitcoin may have a real future, when 'nerds' learn how to better share ideas to all. J
Edit: butts to bits
submitted by kalika235 to Bitcoin [link] [comments]

Bitcoin We Trust Razer Pixel Logo Minimalist A2213 Wallpaper

Bitcoin We Trust Razer Pixel Logo Minimalist A2213 Wallpaper
Bitcoin We Trust Razer Pixel Logo Minimalist A2213 Wallpaper
Is Bitcoin Anonymous? Individuals often think bitcoin is anonymous, but truth be told it actually isn't as anonymous as some might think. Bitcoin, being the most valuable as well as most popular coin out of the vast list of growing cryptos, is in fact pseudonymous. Reason being since each user or identity is known as an address, which can technically be tracked back to an individual if the person is not careful enough. Security measures must be taken in order for an individual to use bitcoin privately and they must be taken often if untraceable bitcoin transactions is something desired when using bitcoin. As most bitcoin users know, BTC transactions can be seen by anyone at anytime from anywhere on the blockchain. Even though the blockchain is just full of addresses sending and receiving BTC, an address can actually become otherwise known as an identity if the bitcoins that were purchased were made using a credit card or bank account on a big bitcoin exchange. Big bitcoin exchanges often have policies that require KYC "Know Your Customer" which can end up legally linking a persons name to a bitcoin address and the BTC it's holding. An easy fix to this problem is to use a bitcoin mixer or bitcoin tumbler as it will completely remove and dismantle ownership to the bitcoins resulting in full bitcoin anonymity. Once the link to the identity and bitcoins is broken, it is lost forever and the bitcoins are cleared of ownership unless found again. Anonymous bitcoin services are offered all over the web but you must be sure you're going to use a trusted bitcoin mixer. By using a trusted bitcoin tumbler you can be sure that the BTC being sent into the bitcoin blender is safe, will be mixed thoroughly, and be delivered back to you. If one wants to be extra careful then it's best to mix bitcoins using a no logs bitcoin mixing service as this ensures all private data will be kept unseen. If one is careful and takes precaution then complete bitcoin anonymization and peace of mind can be accomplished.
submitted by bitcoinwallpaper4 to BitcoinWallpaper [link] [comments]

Bitcoins From Above Razer Pixel Logo Minimalist A2213 Wallpaper

Bitcoins From Above Razer Pixel Logo Minimalist A2213 Wallpaper
Bitcoins From Above Razer Pixel Logo Minimalist A2213 Wallpaper
Am I Anonymous When Using Bitcoin? Bitcoin is not a fully anonymous cryptocurrency like some crypto coins out there, but you can still use the most valuable coin (BTC) and still be hidden from the many curious spying eyes. A service which is known as a bitcoin blender can help with obtaining the anonymity that some deeply desire. Using a service known as a bitcoin blender is the very best way to transact with bitcoin and still remain completely anonymous. If one is concerned about revealing their personal identity then a bitcoin blender service is the very best way to continue transacting bitcoin while keeping a personal identity on a private lock down.
submitted by bitcoinwallpaper3 to BitcoinWallpaper [link] [comments]

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I Tried Day Trading Bitcoin for a Week Beginner Crypto ...

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