certdepot

Certificate Depot A free online tool for generating self-signed SSL/TLS certificates in seconds. No signup required. Website: cert-depot.com Features Generate self-signed certificates with RSA 2048/4096 or ECDSA P-256/P-384 keys Download as ZIP PEM key + certificate or PFX PKCS12 Automatic SAN...

hsm

zhsm A Hardware Security Module HSM library for Zig providing PC/SC access to PIV , CAC , and YubiKey tokens. Status Aspect| Info ---|--- API Stability| Development Zig Version| 0.16.0 Platforms| Linux, macOS, Windows License| MIT Features PIV Support NIST SP 800-73-4 Certificate retrieval slots...

Digital-Signature-Forgery-Attack

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...

CVE-2022-21449-vuln-test

CVE-2022-21449 Vulnerability tester Introduction There's a new CVE-2022-21449 that had bug in ECDSA signature verification. It's one of the algorithms used with JWT for example. Citing the blog post If you have deployed Java 15, Java 16, Java 17, or Java 18 in production then you should stop what...

RAMnesia-Attack

This research presents a comprehensive analysis of two critical classes of attacks on the hardware memory of modern computer systems using DDR5 memory: Phoenix Rowhammer Attack CVE-2025-6202 and RAMnesia Attack CVE-2023-39910 . Both attacks demonstrate fundamental vulnerabilities in the processin...

CVE-2022-21449

CVE 2022 21449 python implementation This project allows you to: Plot an elliptic curve with desired parameters, over a finite field or not Generate a key pair from a given elliptic curve Encrypt / Decrypt a message via ECIES Sign / verify using ECDSA Simulate an exploitation of CVE 2022 21449 Fi...

CVE-2020-0601

CVE-2020-0601 PoC for CVE-2020-0601- Windows CryptoAPI Crypt32.dll POC: https://github.com/ollypwn/CurveBall On kali: 1.Make PKCS12 file openssl req -new -x509 -key spoofedca.key -out spoofedca.crt openssl ecparam -name secp384r1 -genkey -noout -out Microsoft.key openssl req -new -key Microsoft.k...

CVE-2022-21449-TLS-PoC

CVE-2022-21449-TLS-PoC CVE-2022-21449 also dubbed Psychic Signatures in the vulnerability writeup by Neil Madden Proof of Concept demonstrating its usage with a vulnerable client and a malicious TLS server. The malicious server presents a valid as of 2022-04-20 cert chain for www.google.com which...

jfrog-CVE-2022-21449

CVE-2022-21449 Overview This tool allows to perform a quick scan of compiled code archives .jar, .war etc in order to check for vulnerability to CVE-2022-21449 by looking for the string indicating the use of ECDSA algorithm. The tool uses Python3 with no additional prerequisites. Usage python...

CVE-2026-21009-ECDSA-Nonce-Reuse-in-IoT-Firmware-Signing

CVE-2026-21009 – ECDSA Nonce Reuse in IoT Firmware Signing Program Code Python ecdsanoncereusesim.py - Signing firmware with repeated nonce k import ecdsa, hashlib sk = ecdsa.SigningKey.generatecurve=ecdsa.NIST256p vk = sk.getverifyingkey Sign two different firmware images with same nonce due to...

paranoid_crypto

Project Paranoid Overview Paranoid project checks for well known weaknesses on cryptographic artifacts such as public keys, digital signatures and general pseudorandom numbers. This library contains implementations and optimizations of existing work found in the literature. The existing work show...

CurveBall

CurveBall CVE-2020-0601 - PoC CVE-2020-0601: Also known as CurveBall or ChainOffFools, is a vulnerability in the Microsoft CryptoApi specificly in Crypt32.dll where elliptic curve signatures ECDSA of certificates is not correctly verified. There is a very nice blog post here which explains the...

Phantom-Signature-Attack

This research paper presents a comprehensive cryptanalytic study of critical vulnerabilities in the Bitcoin protocol’s digital signature implementation, namely the Phantom Signature Attack CVE-2025-29774 and the fundamental SIGHASHSINGLE processing error . The study demonstrates that incorrect...

python-ecdsa

Pure-Python ECDSA and ECDH This is an easy-to-use implementation of ECC Elliptic Curve Cryptography with support for ECDSA Elliptic Curve Digital Signature Algorithm, EdDSA Edwards-curve Digital Signature Algorithm and ECDH Elliptic Curve Diffie-Hellman, implemented purely in Python, released und...

CVE-2024-31497-POC

CVE-2024-31497 POC This vulnerability exploits the biased ECDSA nonce generation in the ecc-ssh.c file. The nonce is generated with $sha512ID\ ||\ sha512privKey\ ||\ sha1data\ mod\ q$ leaving the top 9 bits to zero. In order to recover the private key we need 60 signatures but with 58 we still ha...

ECC_Attacks

Known Attacks On Elliptic Curve Cryptography Introduction Introduction To Elliptic Curves Elliptic Curves In The Context Of Cryptography ECC Attacks ECDH Attacks The Order Of The Generator Is Too Small The Order Of The Generator Is A Smooth Number The Order Of The Generator Is Almost A Smooth...

CLEANSTART-2025-MW71608 By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak

Security vulnerability affects the bind package. By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak...

ecdsa-private-key-recovery

ecdsa-key-recovery Perform ECDSA and DSA Nonce Reuse private key recovery attacks A cryptographic research tool for analyzing signature vulnerabilities Let's recover the private-key for two signatures sharing the same nonce k. Note how choosing the same nonce k results in both signatures having a...

CVE-2023-33242

CVE-2023-33242 CVE-2023-33242 PoC The simulated Lindell17 protocol is vulnerable to a bit extraction exploit, allowing an attacker to recover the private key by iteratively extracting individual bits of the key. The protocol is designed to generate ECDSA signatures in a client-server model, with...

demo-cve-2022-21449

Demo Project: CVE-2022-21449 Vulnerability This project demonstrates the CVE-2022-21449 vulnerability, which affects Java's ECDSA signature verification. The vulnerability allows a malicious actor to bypass signature verification by using a signature with zero values r=0 and s=0. The project uses...