![]() #LEDGER WALLET WINDOWS 8.1#I used an Asus Windows 8.1 tablet with a keyboard dock as the test bed. The wallet is designed for use on desktop operating systems on Google's Chrome browser. The user will then be able to sign the security challenge and facilitate the transaction. The app will be paired to the wallet using the security card, allowing the wallet to display the challenge on the mobile device, along with the target address and amount of BTC. Ledger is aware of these limitations and is working to develop a mobile companion app that will essentially allow another device to act as a screen for the wallet. Each transaction would provide the attacker with more 'depth' until sufficient information is collected to fully map and reconstruct the contents of the security card.Īs odd as it may sound, using the wallet on a number of different malware-ridden PCs would, in theory, be safer from an anti-MITM perspective than using it to make a few dozen transactions on your own computer. #LEDGER WALLET PC#A persistent attacker with complete control over the user's PC could in theory reconstruct the security card after a few dozen transactions. The trade-off is that it also results in fewer possible permutations of the second-factor code. Using a card in place of a screen obviously allows for a smaller device and keeps the overall cost down. The basic idea is the same, but the implementation is a bit different. The Ledger team opted for a different approach in the form of a security card with 58 pairs of characters. The Trezor hardware wallet, which we reviewed a few months ago, employs a screen to tackle this problem, prompting the user to enter the PIN on a pseudo-random numeric pad, visible only to the user. Security card in lieu of dedicated display #LEDGER WALLET CODE#If the right code is not entered, a transaction cannot take place. The wallet displays the payment address and asks the user to enter codes for four random parts of the address. No transaction can be signed without human interaction – each transaction requires the user to visually scan the security card when prompted by the wallet app. The security card makes such an attack less likely by providing physical two-factor authentication. Without this added security layer, the wallet would be exposed to MITM attacks, as a hacker could, in theory, gain control of the computer and proceed to compromise the wallet. The wallet signs bitcoin transactions internally and aims to prevent man-in-the-middle (MITM) attacks by employing a security card. Since the host computer is the most likely point of failure, the Bitcoin Ledger Wallet Nano is designed to render vulnerable or even compromised computers safe, by introducing another layer of security. The wallet is obviously not designed as a standalone device, as it relies on the host computer to set up and execute transactions. The smartcard has been an industry standard for decades and eliminates a number of security issues that may arise on devices based on multipurpose microcontrollers. The manufacturer of the EEPROM memory used in the CC EAL5+ compliant smartcard offers a 30-year guarantee on data retention and 500,000 read/write cycles. Since it does not use cheap NAND memory like the average USB drive, the Ledger should be more reliable. Ledger's familiar design is where its similarities to traditional USB drives end, though. Facility Tourīitcoin Ledger Wallet Nano security concept #LEDGER WALLET SERIES#In fact, the design looks eerily similar to Super Talent's Pico-A series flash drives. ![]() The plastic device features an aluminium swivel cover with a brushed finish like many USB drives. I have no major complaints about the build quality, although some rough edges are visible upon closer examination. USB flash drive on the right included for reference The box also contains a simple manual, recovery sheet and security card in black faux leather pouch. It is roughly the size of a small flash drive, measuring 39 x 13 x 4mm (1.53 x 0.51 x 0.16in) and weighing in at just 5.9g. In terms of hardware, the Bitcoin Ledger Wallet Nano is a compact USB device based on a smartcard. The wallet launched in early December and for more background on the project you can catch up on our launch coverage. This tech-heavy description does not mean much to the average consumer, though, which is why I am going to explain it in plain language, describing what makes the Bitcoin Ledger Wallet Nano tick. ![]() The Bitcoin Ledger Wallet Nano is a new hierarchical deterministic multisig hardware wallet for bitcoin users that aims to eliminate a number of attack vectors through the use of a second security layer. Purchase: Directly from Ledger and can be purchased with bitcoins. Summary: The Bitcoin Ledger Wallet Nano is an affordable bitcoin hardware wallet. ![]() Description: A USB bitcoin hardware wallet with smartcard security in a very compact package. ![]()
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