Рубрика: Cryptanalysis

In this article we will look at a series of web server software vulnerabilities discovered in the  GNU Bash program  . Many Internet services , including Bitcoin blockchain web servers, use Bash to process some requests, for example when executing  CGI scripts . The vulnerability allows an attacker to execute arbitrary commands by gaining unauthorized access to computer systems, which allows the attacker to extract private…

In this article, we will look at a bug in the DAO code. The hacker exploited a bug in the code of the DAO and stole more or less $50 million worth of ether. I will focus here only on the main technical issue of the exploit: The fallback function. For a more detailed and advanced recount…

Following the article: “Solidity Forcibly Send Ether Vulnerability to a Smart Contract continuation of the list of general EcoSystem security from attacks”. In this article, we will continue this topic related to vulnerabilities and traps. In the process of cryptanalysis of various cryptocurrencies, we are increasingly getting loopholes and backdoors. Honeypots work by luring attackers with a balance stored…

Earlier we touched on the topic: "Improving the overall security of the ecosystem from attacks on smart contracts". In this article, we will continue to develop this painful topic of ecosystem security. Occasionally, it is unwanted for users to be able to send Ether to a smart contract. Unfortunately for these circumstances, it's possible to bypass a…

Bitcoin is an example of a decentralized network. There are no people or organizations that control it. This is part of its architecture. For many, the creation of Bitcoin Cash under the pretext that blocks with more memory would be beneficial is seen by most of the community as an example of an attack on decentralization. dependency on the stakeholder network…

In our earliest work, we published an article on the topic “LATTICE ATTACK” as a complete solution to the HNP [Hidden Number Problem] , but with the recent emergence of a new attack “POLYNONCE ATTACK” , we decided to supplement the article using 79 signatures ECDSA. Based on the previous article, where we took the polynomial 128 bitsand with the actual increase in the number…

In this article, we will again touch on the topic: “Bitcoin’s Critical Vulnerability” and use the brand new attack of 2023 “POLYNONCE ATTACK” on all three examples . The very first mention of this attack is described in an article from “Kudelski Security” . https://research.kudelskisecurity.com/2023/03/06/polynonce-a-tale-of-a-novel-ecdsa-attack-and-bitcoin-tears/ As a practical basis, we will take materials from our earlier article “ Speed ​​up secp256k1 with endomorphism” where the values ​​​​on…

In this article, we will do a fresh install SageMathin Google Colab. We previously published an article: “ Install SageMath for cryptanalysis on Fedora 64bit(10GB) Cloud Virtual Server ”, but in order to continue cryptanalysis of the Bitcoin blockchain, many of our readers prefer to use Debian and, Ubuntuin contrast to Fedora. As far as we know, Google Colab it has been updated to "Ubuntu 20.04.5 LTS". We…

ChatGPT has become an integral tool that most people use daily to automate various tasks. If you have used ChatGPT for any length of time, you would have realized that it can provide wrong answers and has limited to zero context on some niche topics. This brings up the question of how we can tap into chatGPT…

In this article, we will show in detail on slides how to install "SageMath" on a Fedora 30 64bit (10GB) cloud virtual server. For example, we will use the "DIGITAL RUBLE TECH" server . Previously, we used the Google Colab cloud service to install "SageMath" , but unfortunately, due to the latest updates, not all components for cryptanalysis of the Bitcoin blockchain work properly. Registration: First we need…