Secure Your Crypto Blockchain Wallet

Bitcoin - The Currency of the Internet

A community dedicated to Bitcoin, the currency of the Internet. Bitcoin is a distributed, worldwide, decentralized digital money. Bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin. You might be interested in Bitcoin if you like cryptography, distributed peer-to-peer systems, or economics. A large percentage of Bitcoin enthusiasts are libertarians, though people of all political philosophies are welcome.
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bitcoinsec: security news, tips and updates for everything Bitcoin!

/bitcoinsec is a subreddit for Bitcoin users who want to stay on top of security news, updates and tips. It is also a place that the community to come together to discuss security matters and concerns.
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Bitcoin Security: Securing your wallet and alerting you to threats.

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Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat

Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat
Bitcoin hacks and thefts have exploded since bitcoin's epic 2017 bull run saw the price balloon to around $20,000.

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The bitcoin price has fallen by more than half since its late-2017 all-time high but bitcoin users remain a popular target for hackers.
Now, researchers have warned "millions" of bitcoin users might have been exposed by a newly discovered vulnerability in a number of popular bitcoin wallets.
Bitcoin transactions across three major bitcoin wallets were vulnerable to what some might call a double-spending attack, researchers at Tel Aviv-based bitcoin and crypto company ZenGo have revealed, adding other wallets beyond the nine they tested could be compromised.
The bitcoin wallets known to be affected—Ledger Live, Edge and BRD—have been updated in an effort to prevent the attack after their developers were alerted by ZenGo.
The vulnerability, named BigSpender, allows the attacker to make the wallet holder believe a payment has been received while in fact it has been replaced by the sender. The exploit could prevent the wallet's owner from accessing its funds, though not everyone agrees on the nature of the vulnerability.
"The core issue at the heart of the BigSpender vulnerability is that vulnerable wallets are not prepared for the option that a transaction might be canceled and implicitly assume it will get confirmed eventually," ZenGo's senior software engineer, Oded Leiba, wrote in a blog post revealing the weakness.
"This negligence has many faces. First and foremost, a user’s balance is increased on an incoming transaction while unconfirmed and is not decreased if the transaction is double-spent and thus effectively canceled."
Ledger and BRD have questioned the language used by ZenGo researchers.
"There is no actual double spend being performed," the Ledger security team said via email. "The user funds stay safe. Nevertheless, the display of received transactions could be misleading."
The bitcoin wallets that were found to be susceptible to the attack are some of the most widely used—something ZenGo researchers said highlights the bug's seriousness.
"Potentially several millions of users were exposed before the fix based on the user base of Ledger and BRD public numbers," ZenGo's chief executive Ouriel Ohayon said via email. BRD recently passed the 5 million user mark, its chief technology officer told bitcoin and crypto news outlet Coindesk.
While the bitcoin wallet developers dispute the exploit's risk, Ohayon insists the threat could actually be worse than is known.
"It does not mean that there are no other issues or that other wallets are not exposed to the BigSpender attack," Ohayon said, adding other wallets ZenGo researchers tested, including its own, were not vulnerable to the attack.
"Considering that this could result in the impossibility to spend your funds and the fact that this could be done at scale, this [exploit] can be considered serious."
"Hacks are constant. Security is an on-going battle fought by the industry and one that cannot be won by a single player or a single product, let alone a version update. To allow mass adoption it is critical that wallets invest as much effort in research and security and they do in product development and services."
submitted by MIEX_Official to u/MIEX_Official [link] [comments]

@cz_binance: If you are holding your own keys, please stay up-to-date with security fixes. Stay #SAFU. Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat https://t.co/LpipSwnkrn

@cz_binance: If you are holding your own keys, please stay up-to-date with security fixes. Stay #SAFU. Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat https://t.co/LpipSwnkrn submitted by rulesforrebels to BinanceTrading [link] [comments]

Fix Issued For Serious Bitcoin Wallet Security Threat (current BTC/USD price is $9,104.46)

Latest Bitcoin News:
Fix Issued For Serious Bitcoin Wallet Security Threat
Other Related Bitcoin Topics:
Bitcoin Price | Bitcoin Mining | Blockchain
The latest Bitcoin news has been sourced from the CoinSalad.com Bitcoin Price and News Events page. CoinSalad is a web service that provides real-time Bitcoin market info, charts, data and tools.
submitted by coinsaladcom to CoinSalad [link] [comments]

Atomic Wallet - The Best Bitcoin Wallet: Secure, Comfortable and Fast

Atomic Wallet - The Best Bitcoin Wallet: Secure, Comfortable and Fast

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Features of Atomic Wallet

Atomic Wallet support for top 25 blockchains and over 300 tokens. It’s been added over almost all the top coins and tokens you can manage securely in your desktop. You can also add and manage all your private keys are generated locally from the seed phrase on your device and protected by encryption.
Atomic is build on top of common open source libraries, that guarantees your funds are secure. Private keys are encrypted and never leave your device, that means you have full access and control over your crypto in Atomic.
In this article I will show you all about Atomic Wallet’s Features and Bitcoin the coin I will describe below
https://steemit.com/atomicwallet/@loideptrai/atomic-wallet-the-best-bitcoin-wallet-secure-comfortable-and-fast
submitted by Drloipro to u/Drloipro [link] [comments]

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security submitted by Scerdoo to Bitcoin [link] [comments]

BitPay Beefs Up Bitcoin Wallet Security with Intel Integration | VentureBeat

BitPay Beefs Up Bitcoin Wallet Security with Intel Integration | VentureBeat submitted by jameslwalpole to Bitcoin [link] [comments]

A question on Bitcoin wallet security/safety

OK, so i have two choices for Bitcoin security, and i am trying to asses which is the most secure.
I have Electrum on my personal laptop - internet connected
Obviously attack vectors exist.
1) a hacker can hack the wallet, as its on an online computer. 2) someone can steal my laptop, and attempt a hack that way 3) Someone can find out my 12 word seed and create a new wallet on another computer 4) My house burns down, taking the computer, wallet, and paper written backup 12 word seed with it - it is also in the house, different location.
The second option i have is
Ledger HW1
which also has obvious attack vectors
1) An attacker finds my HW1 - guesses my pin (within three guesses) and finds my security code card (in the house different location) - stealing bitcoin 2) An attacker gets the 24 word seed, and creates a new wallet on a new device 3) An attacker pretends to be me and orders a new security code card, and then steals the HW1 and hacks the 4 digit password. 4) House burns down, taking HW1, Security Code Card, and 24 Word Seed with it.
My question is - am i missing anything? What is the best way to secure my bitcoin?
Both seem to have obvious attack vectors...
Obviously, i can put the security code card in another location - but i need to transact every now and again with that Ledger Wallet - so therefore it stays in the same house as the HW1.
The 12/24 backup seed i can obviously put in another location. I am ok with this - but nothing stopping that second location from being hacked/robbed/burned down - causing me issues.
Anyone got any ideas/suggestions/advice?
Thanks in advance.
submitted by midipoet to Bitcoin [link] [comments]

How To Secure Your Bitcoin Wallet: Security Essentials

How To Secure Your Bitcoin Wallet: Security Essentials submitted by VincentLaurent to CryptoCurrencies [link] [comments]

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security - Coinjournal

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security - Coinjournal submitted by Ocarding to btc [link] [comments]

[uncensored-r/Bitcoin] Important Bitcoin Wallet Security

The following post by Harry_JR is being replicated because the post has been silently removed.
The original post can be found(in censored form) at this link:
np.reddit.com/ Bitcoin/comments/7v5v1l
The original post's content was as follows:
As an ethical hacker, I visit many hacking and cracking forums. I am now warning all Bitcoin users that guides are being made for cracking the wallet.dat file. They are also suggesting many ways to obtain that file as well! You need to have a password of a minimum 9 characters with caps lower case, special characters and numbers. Stay safe.
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

Are Anroid bitcoin wallets secure?

Stephen Kawamoto (Radha Santadharma)  23h I have $4.35CAD in my physical bitcoin wallets.
$2.90 is in Electrum wallet and $1.45 in Bitcoin wallet.
Can a bitcoin thief hack into my smartphones from Russia?
submitted by sageb1 to BitcoinMining [link] [comments]

Important Bitcoin Wallet Security /r/Bitcoin

Important Bitcoin Wallet Security /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

How to get the best of bitcoin exchange convenience and bitcoin wallet security

How to get the best of bitcoin exchange convenience and bitcoin wallet security submitted by jameslwalpole to Bitcoin [link] [comments]

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security

Modern Wi-Fi Networks are Vulnerable, Impact on Mobile Bitcoin Wallet Security submitted by BitcoinAllBot to BitcoinAll [link] [comments]

02-04 13:53 - 'Important Bitcoin Wallet Security' (self.Bitcoin) by /u/Harry_JR removed from /r/Bitcoin within 252-262min

'''
As an ethical hacker, I visit many hacking and cracking forums. I am now warning all Bitcoin users that guides are being made for cracking the wallet.dat file. They are also suggesting many ways to obtain that file as well! You need to have a password of a minimum 9 characters with caps lower case, special characters and numbers. Stay safe.
'''
Important Bitcoin Wallet Security
Go1dfish undelete link
unreddit undelete link
Author: Harry_JR
submitted by removalbot to removalbot [link] [comments]

Ledger raises $75 million to work on Bitcoin wallet security

Ledger raises $75 million to work on Bitcoin wallet security submitted by SAtechnewsbot to SAtechnews [link] [comments]

BitPay beefs up Bitcoin wallet security with Intel chip integration

BitPay beefs up Bitcoin wallet security with Intel chip integration submitted by Egon_1 to btc [link] [comments]

Bitcoin Wallet Security: Highly Secure + Highly Practical

Hi All,
I'm partially making this post as a guide of sorts, but also for the more experienced members to give some feedback about how to improve the security or practicality of this setup.
As the setup evolves, I'll keep this post up-to-date with the changes.
My goal was to keep a highly secure wallet, while maintaining maximum practicality and effortless backups of the important data; Something that you'd be comfortable giving to a technical n00b or your mum.
I wanted the ability to have my wallet available for transactions very easily, but store it securely when it wasn't needed.
This is not intended to be a cold-storage or offline wallet. Most non-tech people don't have access to a spare pc/laptop that they dedicate as an offline wallet. Paper storage and brain wallets are also an option, but I frequently lose paperwork and forget things.
So here's my mini guide:
TL;DR:
The long version:

Software Requirements:

Bitcoin Wallet software: Electrum. Make sure you get the "Portable" version.
Encryption Software: Truecrypt or FreeOTFE.

Instructions:

1) Creat a secure "Hard Drive" for your wallet.
Use TrueCrypt to create a new "container" with the following settings:
  • File location: (I use a folder in my Dropbox for effortless backups)
  • Never Save History
  • Encryption algorithm: Serpent-Twofish-AES
  • Hash Algorithm: Whirlpool
  • Volume Size: 100MB
  • Volume Password: (Use a nice, long, easy to remember passphrase)
  • Tick "Use Keyfile": Generate a new keyfile (I used the default Whirlpool hash) and save the keyfile to a different path outside your Dropbox.
  • Backup your keyfile (not to Dropbox!)
  • Format the volume to finish.
2) Use TrueCrypt to access your new encrypted Volume
  • Open TrueCrypt and pick a free drive letter
  • Mount the encrypted file that you created in your Dropbox earlier
  • Enter your passphrase
  • Use your keyfile that you stored in another folder
3) Explore the Encrypted Volume
Open "My Computer" and you should have a new Hard Drive called "Local Disk"
  • Rename the disk to be something more memorable. I called mine "Electrum"
  • Copy/download/save the Electrum Portable software to the new encrypted drive.
4) Create your new Bitcoin Wallet
  • Run Electrum Portable from the encrypted drive
  • Create a new wallet
  • Copy the 12 words of the wallet generation seed.
  • Save the words to a secure location. (I use an encrypted Evernote note)
  • Re-enter the 12 words to continue
  • Pick a password for your wallet. (Use a Passphrase as you did earlier)
  • That's your Wallet created :)
  • Close Electrum
  • Dismount the Encrypted Volume
5) Auto Launch the Encrypted Volume & Electrum
Create a batch file on your desktop (I called mine OpenWallet.bat)
Edit the file in Notepad and Paste the following text:
:: ------------ User Variables ---------------------------- :: Set these to your own liking SET SecureDriveLetter=P SET EncryptedContainer=C:\Dropbox\!Secure\personal_wallet SET KeyFile=\\nas\backups\protected\personal_wallet.key :: ------------ /User Variables ---------------------------- :: ------------ System Variables ---------------------------- :: Generally don't need to change unless the paths are wrong SET TrueCrypt=%ProgramFiles(x86)%\TrueCrypt\TrueCrypt.exe SET ElectrumPortable=electrum-1.9.5-portable.exe :: ------------ /System Variables ---------------------------- "%TrueCrypt%" /v "%EncryptedContainer%" /l %SecureDriveLetter% /a /h no /keyfile "%KeyFile%" /quit Start "Electrum" /wait /d %SecureDriveLetter%:\ %SecureDriveLetter%:\%ElectrumPortable% "%TrueCrypt%" /d %SecureDriveLetter% /quit ::pause 
Edit the User Variables section to your liking and make sure that the System Variables paths are correct for your system.
6) Open Your New Secure Electrum Volume
Launch the OpenWallet batch file from your desktop. You should be prompted for your TrueCrypt volume password.
Once the correct password is entered, your secure drive will be mounted as P: Drive.
Electrum will open and be available to use as normal.
After you close Electrum, your encrypted volume will dismount until the next time you run the batch file.
Dropbox will store a copy of your encrypted volume and sync it every time it changes.
submitted by incognito-007 to Bitcoin [link] [comments]

[Question/Discuss] What is to be done about the practicality of Bitcoin wallet security?

Hey all, been very interested in Bitcoin since I first heard about it in 2011, very well aware of its technological innovations and capabilities and its potential and current usage for immense social change.
Would someone explain to me the issue of Bitcoin security? My current perspective on this is that Bitcoin private keys are very prone to being stolen, either through human error (software misuse), hacking (whether through bruteforcing passphrases or vulnerabilities in software that can be systematically exploited by an entity like the NSA) or accidents (data loss).
It is different depending on your perspective, I personally would like to see Bitcoin's adoption see full replacement of fiat currencies (simply out of curiosity), and a limitation for me is how easily and irrevocably my money can be lost.
Now I understand there are ways to mitigate this, would anyone help me understand? :) A combination of 2FA, storing private keys in multiple locations and in multiple formats, having the funds only accessible/movable according to multisig wallets, using special hardware (trezor) for finance management. Do you think this could effectively mitigate these issues?
Cheerio,
Liam.
submitted by liamzebedee to Bitcoin [link] [comments]

LighthouseProjects : Ninki Wallet : Security Bounties / Pledge to help raise the bar of Bitcoin Wallet Security

submitted by Ninki-Ben to Bitcoin [link] [comments]

Developers Introduce Bloom Filters to Improve Bitcoin Wallet Security

Developers Introduce Bloom Filters to Improve Bitcoin Wallet Security submitted by bitlitguy to btc [link] [comments]

Multisig Best for Bitcoin Wallet Security But Only 11 Percent Use It

Multisig Best for Bitcoin Wallet Security But Only 11 Percent Use It submitted by bitentrepreneur to Bitcoin [link] [comments]

Best Bitcoin Wallet for Beginners ? The Most Safe & Secure ... How To Create a Bitcoin Wallet 2019  Safe and Secure Way crypto wallet security nobody talks about... How to keep Bitcoin Safe and Secure (without taking it offline) Airbitz - Bitcoin Wallet Security, Privacy, & Ease of Use ...

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Best Bitcoin Wallet for Beginners ? The Most Safe & Secure ...

Your crypto wallet security depends completely on keeping your private key or seed phrase safe from loss, theft or destruction, and there are quite a few devices to help you do this. However, this ... There are extremely secure and safe ways you can use, like using a paper wallet or a cold storage device, but to me that seems like too much trouble. Bitcoin is supposed to be online right? If we ... Presentation of the various types of bitcoin wallets and how each one balances security, privacy, and ease of use. Presented by Paul Puey, CEO of Airbitz htt... Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. BUY THE WALLET DIRECTLY FROM THE MANUFACTURER HERE: https://shop.ledger.com/pages/ledger-nano-x?r=849e This is simply the best bitcoin wallet for beginners, ...

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