Bestsellers Git versioning system shaped sticker Python language shaped sticker Gnu/Linux badge sticker Vim editor shaped sticker Arch Linux OS badge sticker Twitter Tweets by @unixstickers Facebook Unixstickers × Our newsletter is FUN!Once a week we come up with new swag or a deal and ship it to your inbox.It's fun ^^ YOU GET: $5 Free shipping bonus Dedicated news, previews & offers!The Bitcoin community has banded together to offer a crowd-funded $10,000 bounty.Technology giants – such as Google, Microsoft and Yahoo – offer up big rewards to researchers who report critical vulnerabilities.Bitcoin users are now offering up their own type of bug bounty.In the wake of a number of attacks and hacks affecting the Bitcoin community, users of the digital currency have banded together to offer a crowd-funded $10,000 bounty to whoever fixes a Mac OS X Bitcoin LevelDB data corruption issue.18 to announce that the bounty would be awarded to the person or persons who document how and provide an explanation as to why anyone can consistently reproduce the data corruption, as well as write a code fix that Bitcoin developers accept.

LevelDB is Google's open source key-value database and is used by Bitcoin to store transaction data.The problem for some Mac OS X users is that, essentially, their transaction data is being lost.The LevelDB data corruption issues have been affecting Mac OS X users sporadically since the introduction of LevelDB in Bitcoin 0.8.x, according to the post by Togami.He provides links where those who are affected have been discussing their issues.“Bitcoin master now contains two Mac-specific fsync patches and an upgrade to LevelDB 1.13,” Togami wrote.“Bitcoin 0.8.5 OMG3 and Litecoin 0.8.5.2-rc5 contains these same patches.It is possible that a different Mac corruption issue was solved by these earlier patches, but users of these branches have reported continued corruption.Curiously, corruption seems to happen after a clean shutdown and restart of the client.” Although still in the dark about many issues, Togami seemed to pick up on one trend.“All corruption reports seem to be from MacOS X 10.8.x and 10.9 users,” the engineer wrote.

“It is unclear if earlier versions of MacOS X are affected.It is unknown if particular hardware or software configurations are involved.” Currently the bounty stands at 10 Bitcoins and 200.2 Litecoins, which is worth around $10,000 going by current exchange rates.Gavin Andresen, chief scientist at the Bitcoin Foundation, contributed five Bitcoins, BitcoinTalk donated four Bitcoins, Litecoin development team put forward 200 Litecoins and public donations have added up to one Bitcoin.November has not been the best month for Bitcoin service providers and users.Earlier this month Bitcoin eWallet Inputs.io was the victim of a hack that relieved the service of 4,100 Bitcoins, which translated at the time to about $1.1 million.About two weeks later, attackers stole 1,295 Bitcoins from Denmark-based Bitcoin exchange BIPS, which currently translates to more than $1.1 million.How to Set Up a Split Bitcoin Wallet in Qubes What is a “Split” Bitcoin Wallet?A “split” bitcoin wallet is a strategy of protecting your bitcoin by having your wallet split into an offline “cold storage” wallet and an online “watching only” wallet.

A “Watching” Wallet and a “Cold” Wallet Create a Debian 8 backports template using the Qubes VM Manager or running qvm-clone debian-8 debian-8-backports in dom0.Add backports to the sources for the new template by opening a terminal in the new template, run sudo vi /etc/apt/sources.list and add deb http://http.debian.net/debian jessie-backports main.(If you are new to vi text editing, type i to be able to edit, and when done editing press ESC then type :x and press ENTER.)law ethereal glovesUpdate source list: sudo apt-get update.best coin after litecoinInstall electrum from backports: sudo apt-get -t jessie-backports install electrum.bitcoin wallet meaningshut down your debian-8-backports template create an offline-bitcoin qube based on debian-8-backports using the Qubes VM Manager or running qvm-create -t debian-8-backports -l black offline-bitcoin and qvm-prefs -s offline-bitcoin netvm none in dom0.nguon goc bitcoin

follow the electrum documentation in creating an offline wallet create a watching-bitcoin qubes based on debian-8-backports connecting to the internet how ever you prefer using the Qubes VM Manager or running for example qvm-create -t debian-8-backports -l green watching-bitcoin and qvm-prefs -s watching-bitcoin netvm sys-whonix in dom0.follow the electrum documentation in creating an online watching-only wallet Important Notes The private keys (xpriv) should never be moved outside of offline-bitcoin.dogecoin value historyFor copying out the public keys (xpub), Qubes provides two secure, convenient methods: the inter-VM clipboard and inter-VM file copy tools.bitcoin 10 vragenCompared to traditional physically air-gapped machines, these tools makes it very easy to copy out public keys.bitcoin fedora

using secp256k1 with Fedora's OpenSSL Why?Due to possible legal issues Redhat hobbles the openssl library removing multiple curves, see: the bugzilla entry.Some software (like bitcoin, namecoin,..)requires the secp256k1 curve, so I re-included it in this file.download the source rpm: yumdownloader --source openssl install it: rpm -i openssl-1.0.1e*.src.rpm copy this file to your %_sourcedir directory rebuild: rpmbuild -bb $(rpm -E %_specdir)/openssl.spec reinstall it: rpm -Uvh --force $(rpm -E %_rpmdir/%_arch)/openssl-*.rpmbitcoin paper satoshiCoinDesk has a Bitcoin Price Ticker widget that can be embedded for free into your own website or blog.request bitcoin donationThe widget displays the current Bitcoin Price Index, today's high and low, and a sparkline showing price movements over the last sixty minutes.Use the following code to embed the 210 x 130px widget into your site: The widget is also available in a larger size (300 x 250px) by using the following code: You can either left-, right- or center-align the widget on your page by using the "data-align" attribute, for example: Please download our README file for further information on how to use the Bitcoin Price Ticker widget.