IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [bitcoin]

BitCoin is a distributed crypto-currency. General questions about bitcoin, other crypto-currencies and their environment not directly relating to security are better suited for bitcoin.stackexchange.com

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I want to hire someone on Upwork to install a bitcoin trading bot on a cloud server. What vulnerabilities should I watch out for?

Context I tried installing Tribeca (a bitcoin trading bot) myself yesterday, but messed it up somehow, as I'm not very familiar with Docker/Git/NPM/mongoDB technologies (a little knowledge is dangerous &c, &c). I'd like to pay someone on Upwork to…
user29357
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Unidirectional Data Transmission to a Smartphone

Unidirectional Data Transmission to a Smartphone I'm going to use an old Android phone to store sensitive data (e.g., Bitcoin wallet private key), with no SIM card and WiFi and Bluetooth turned off. I could disable wireless connections physically if…
anton_
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Did Mt. Gox lose their own or customers bitcoins?

I understand bitcoin superficially, and the concept of the blockchain. When I heard about Mt. Gox, I assumed that they had lost their own money. But apparently, they lost their customer's money. If one can only give away their bitcoins by…
misterelliot
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DoS attacks and bitcoin

I was wondering what the repercussions were if a Bitcoin exchange or website that holds bitcoins were to succumb to a DoS attack. In my understanding, all a denial-of-service attack does is deny legitimate users access to the website. However,…
Mr_Mars
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Tiny USB sticks

To store my Bitcoin safely, I have an offline transaction setup. Computer A is online with a copy of the blockchain, and computer B is offline with the private keys. To make a transaction, I craft it on A, transfer it to B via USB, sign it on B,…
Randomblue
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Anonymity of Bitcoin

I just asked myself that when you have bitcoin network, which is as we know "pseudo" anonym. Because of the transaction logs of the network (which are afaik endless), it seems that transactions are traceable. But my question is how traceable am i…
Dirk
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A bitcoin miner is getting install on my web server with the apache2 process

For a few weeks, someone, probably a bot keep installing a bitcoin miner on my server, I find it because it is taking all the CPU. The process name is kdevtmpfsi located at /tmp/kdevtmpfsi, there's watch dog process kinsing located at…
christianb35
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Strange GET request to my web application

I developed a Django application for a school project and I hosted it on an EC2 instance to test and learn the environment. During inspection of the logs, I found the following GET request, "GET…
Emre Sülün
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How is the bitcoin block header data padded for SHA256 hashing?

I see that a block contains 80 bytes. SHA256 expects integral multiples of 64 bytes as input. How are the remaining 48 bytes calculated?
user170174
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Input password to Bitcoin CLI

I'm new to bitcoin and I'm very concerned about keeping my wallet secure. As I prefer CLIs over GUIs for many reasons including security, I'm learning how to use the bitcoin-cli command on GNU/Linux. In particular, the command bitcoin-cli…
e18r
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Being anonymous with bitcoin

In the recent ransomware attacks, attackers have asked the targeted organizations to pay them in bitcoins. How can they be anonymous if they deal in bitcoins? Can they convert bitcoins to any other currency?
Sandhya Tiwari
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Why isn't Internet DNS based on blockchain?

Aside from the fact that verisign makes a lot of money doling out certificates from a central location.
Rob Truxal
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How can I check the integrity of a Bitcoin tarball with GPG?

I plan on running several so called Full node servers with bitcoind (Bitcoin Core daemon). All servers are running GNU/Linux Debian Stretch. How do I verify integrity of the downloaded tarball with a GPG key and SHA-256 hash? I downloaded the files…
LinuxSecurityFreak
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What are the benefits to adding a bitcoin blockhash UID notation to one's OpenPGP key?

Example: Notation data: blockhash@bitcoin.org 000000000000000011d9f6931e65f814c6f3b221736b0c45f25e0365a3d156fa As seen here: https://sks-keyservers.net/pks/lookup?op=vindex&search=0x7FAB114267E4FA04 In case you are not familiar with bitcoin, the…
Jonathan Cross
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Ideal cryptocurrency digital signature

What are the characteristics of the ideal digital signature for cryptocurrency transaction verification? The reason I ask is because this answer about bitcoin signatures describes a potential vulnerability which makes this particular use of ECDSA…
user36556
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