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Cryptanalysis

Crypto Deep Tech

Bit-flipping attack on Wallet.dat: Risks of using AES-256-CBC without authentication, exploitation and extracting private keys from Bitcoin Core

Bitcoin Core program uses the symmetric cryptographic algorithm  AES-256-CBC to protect the wallet password . This algorithm is used to encrypt the wallet file (wallet.dat), where the user's private keys are stored. The level of protection is provided by a 256-bit key, which is created from the user's password. Bitcoin Core also uses elliptic curve cryptography to generate keys,…
Crypto Deep Tech

Private key Debug: Incorrect generation of private keys, system vulnerabilities and errors in calculating the order of the elliptic curve secp256k1 threats to the Bitcoin ecosystem

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,…
Crypto Deep Tech

Discrete Logarithm mathematical methods and tools for recovering cryptocurrency wallets Bitcoin

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…
Crypto Deep Tech

DUST ATTACK blockchain transaction with confirmation of isomorphism for a total amount of 10000 BTC

In this article we will cover a broad topic: “Dust Attack” known as: "Dusting Attack"or "Crypto Dust". Perhaps every cryptocurrency user or holder of a large amount of BTC, ETH coins replaced the receipt of an insignificantly small amount of coins in satoshi on their cryptocurrency wallet , this receipt is disguised as "Donate", but in fact it is a whole mathematically refined system for taking…
Crypto Deep Tech

Digital Signature Forgery Attack: How CVE-2025-29774 Vulnerabilities and the SIGHASH_SINGLE Bug Threaten Multi-Signature Wallet Operational Methods with Fake RawTX

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…
Crypto Deep Tech

Bitcoin Cryptanalysis: CVE-2025-27840 Vulnerability in ESP32 Microcontrollers Puts Billions of IoT Devices at Risk via Wi-Fi & Bluetooth

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,…
Crypto Deep Tech

Quantum Attacks on Bitcoin: Assessing Vulnerabilities and Developing Defense Strategies Against Emerging Quantum Computing Threats

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…
Crypto Deep Tech

Research into Signature Malleability and Private Key Compromise in Bitcoin Signatures

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…
Crypto Deep Tech

Jacobian Curve Coordinate Manipulation: Exploring the Vulnerability of a Fake Signature Using a Bitcoin Wallet Decodable File

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…
Crypto Deep Tech

Vector76 Attack: Researching and Preventing Threats to the Bitcoin Network Detailed Cryptanalysis Based on Real Data

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…
Crypto Deep Tech

Fuzzing Bitcoin: Search for critical vulnerabilities and new methods of protecting cryptocurrency

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…