In this article, we will look at the cryptographic attack of digital signature forgery (Digital Signature Forgery Attack), its consequences pose a threat to the security of transactions in the Bitcoin network, since digital signatures confirm the ownership and authorization of cryptocurrency transfers. We will consider examples of the impact of such attacks on Bitcoin based on…

This paper analyzes cryptographic vulnerabilities related to incorrect generation of private keys in blockchain systems. One of the key issues is the incorrect calculation of the constant N, which determines the order of the group of points of the elliptic curve secp256k1, which can lead to the generation of invalid keys. This poses a serious security threat,…

This paper discusses how an attacker can introduce a hidden list of vulnerabilities through module updates, which can lead to compromise of ESP32 devices and gaining unauthorized access to private keys, affecting billions of devices using this microcontroller. One of the key issues is the CVE-2025-27840 vulnerability discovered in the ESP32 architecture. To ensure security for the Bitcoin network,…

Many crypto experts are asking: Will the cryptocurrency industry be able to withstand the new technological revolution? This article will discuss modern methods of protecting financial transactions and the Internet based on cryptography, which may be powerless against a sufficiently powerful quantum computer, and whether cryptocurrencies, whose market is estimated at hundreds of billions of dollars, are…

In early 2025, the rise in the rate of popular cryptocurrencies had a significant impact on financial transactions. Despite their widespread use and apparent security, these systems remain vulnerable. One of the main problems remains the recovery of lost cryptocurrency wallets and private keys, which can be done using complex mathematical algorithms. In this article, we will…

A vulnerability known as Signature Malleability poses a serious threat to Bitcoin and Ethereum cryptocurrencies that use the Elliptic Curve Digital Signature Algorithm (ECDSA). This vulnerability allows attackers to manipulate signatures, creating invalid but acceptable signatures for the system. This article discusses the mechanisms of exploitation of this vulnerability, its implications for the security of cryptocurrencies, and…

In this article, we will look at a vulnerability associated with the implementation of the Jacobian Curve. In recent years, cryptocurrencies such as Bitcoin have become an important part of the financial ecosystem. However, as their popularity grows, so do the threats associated with cybersecurity. One such threat is the Jacobian Curve vulnerability, which affects the Elliptic…

With the development of cryptocurrency technologies and the increasing popularity of Bitcoin, various software such as Flash Bitcoin Software and Fake BTC Software have appeared in the market . These programs can lead to disastrous consequences on the Bitcoin ecosystem . In this article, we will look at what these softwares are, how they work and what impact they have on the Bitcoin cryptocurrency using…

Cryptographic applications and cryptocurrency wallets have critical components such as key generation, encryption/decryption, transaction signing, etc. These components should be the main targets for fuzz testing. Using fuzz testing in cryptographic applications and cryptocurrency wallets helps identify and fix vulnerabilities, increasing the security and reliability of the software. Fuzzing testing (or simply Fuzzing) is a software testing method that…

In this study, we will look at the DeserializeSignature vulnerability, which allowed attackers to create invalid ECDSA signatures on the Bitcoin network. In cryptography, an ECDSA digital signature is a mathematical scheme that allows you to prove the authenticity of a digital message or document. In the Bitcoin network, signatures are used to authorize transactions, confirming that…