About the author  ⁄ Phillip Archer

Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. The full-blown bitcoin mining arms race continues, as the eASIC/ActiveMining partnership announced more details on their ASIC bitcoin miner line that tops out at 24 TH/s. ActiveMining is a publicly traded bitcoin mining company who has partnered with eASIC to develop a 28nm application specific integrated circuit (ASIC) chip. ActiveMining is the parent company of Virtual Mining Corp (VMC), which is the business entity selling mining products to consumers. To design and manufacture the chips they teamed up with eASIC, a semiconductor company that’s …

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An upgrade to Bitcoin-qt was released today and consists of several security and bug fixes bundled for release as version 0.8.4. It is recommended that all users upgrade immediately, since the release of these fixes makes finding the vulnerabilities in older code trivial. Included in this release are three security updates as well as several small bug fixes that were causing the application to crash or databases to become corrupted. Denial of Service Fix Bitcoin-qt 0.8.0 introduced Bloom Filters which allow for more flexibility with respect to how much of the block chain must be downloaded. Bloom Filters are a …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. Bitfury’s resellers have begun shipping their 400 GH/s “Full Kits” to customers. After initial accounts of prototypes successfully mining on August 2nd, full production units are now ready. Over the last year Bitfury, a Russian ASIC bitcoin mining manufacturer, has been quietly developing a 55nm ASIC chip that runs around 3 GH/s. Bitfury sold bulk quantities of chips to US and EU distributors who partnered with “100 TH/s”, a publicly traded mining company, to develop fully functional units. The ASIC chips must be set …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. ASICMiner, the only company selling ASIC bitcoin mining hardware out of available inventory, just reduced the price of their largest miner to 3.5 BTC. The ASICMiner blade was unavailable for several weeks before Friedcat, CEO of ASICMiner, announced on August 11th that they would be selling them again at the then-reduced rate of 10.5 BTC each. Given that every other ASIC bitcoin mining hardware company sells pre-orders for units months in advance of actual delivery, ASICMiner has used their monopoly over the in-stock market …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. Today Cointerra released more information on their ASIC bitcoin miner product line, as well as a more competitive pricing on the 2 TH/s miner. Cointerra is led by Ravi Iyengar, who was lead CPU Architect at Samsung Corporation prior to founding Cointerra. He has recruited a robust team of specialists and advisors including their most recent announcement of Timo Hanke as their Lead Cryptographer, who brings with him 15 years of research experience in computer algebra and number theory. Application specific integrated circuits (ASIC) …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. It appears the Avalon ASIC drought may turn into a hashing power tidal wave as reports surface that the first 20,000 out of a remaining 800,000 ASIC chips are on their way to customers. Application specific integrated circuits (ASIC) are specialized chips that perform bitcoin mining calculations. Starting in mid-April, Avalon sold bulk orders of ASIC chips in batches of 10,000, with each chip hashing at an estimated 400 MH/s overclocked. Although Avalon initially estimated a 10-week lead time after orders were placed, hundreds of …

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For a second time in as many weeks, users of mobile bitcoin wallets have become vulnerable to a random number generator that exposed their private keys in transactions. Transferring bitcoin requires signing a transaction with a private key, in combination with a random number that is generated by whatever software is sending the transaction. The private key is what allows a user sole access to spending bitcoins in their address. If a random number is not actually random but predictable or repeated, then a careful observer can reverse-engineer the user’s private key and gain access to all bitcoins in that …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. Butterfly Labs (BFL) recently announced a new $4,600 bitcoin mining product that operates at 600 GH/s. The new miner is called the Monarch and will be the same form factor as a standard graphics card. Their second generation ASIC chip will use a 28nm process compared to the 65nm of their first generation. Application specific integrated circuits (ASIC) are specialized chips that perform bitcoin mining calculations. ASIC nodes are measured in nanometers (nm) and smaller nodes allow for faster and more power efficient designs. The …

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A few days ago a severe vulnerability in the Android implementation of the Java SecureRandom random number generator was discovered. The result of this vulnerability is that private keys used in transactions on Android devices can be determined. All bitcoins in addresses used on Android devices need to be immediately rotated to a new address. Bitcoin uses public/private key cryptography to sign bitcoin transactions. The security of the system relies on each address having it’s own private key that is only known by the owner of the address. If a malicious party were to gain control of the private keys …

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Considering a bitcoin mining hardware purchase? Make a more informed decision with our Bitcoin Mining Dashboard. Today, after several weeks of silence on the status of the 10,000 chip bulk orders, Yifu Guo posted on Avalon’s web site a story of extortion in china. Several weeks ago a team member’s personal information was identified and family members were intimidated. Reportedly, the malicious party was threatening Avalon team member’s safety if their demands for payment were not met. The radio-silence during was attributed to their evaluating potential solutions and implementing new security procedures. Also included in this report is an update on …

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