---
id: 1996
title: "CSAW CTF Crypto Challenge: Breaking DSA"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2018/12/17/csaw-ctf-crypto-challenge-breaking-dsa/"
published_at: "2018-12-17T11:50:42Z"
tags: ["ctf", "cryptography", "writeup", "dsa", "csaw", "randomness"]
phying_url: "https://phying.com/item/1996"
lang: en
---

# CSAW CTF Crypto Challenge: Breaking DSA

## Summary

Walkthrough of Trail of Bits' CSAW CTF challenge 'Disastrous Security Apparatus,' showing how weak randomness and reused values break DSA signatures.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2018-12-17T11:50:42Z
- **Original:** https://blog.trailofbits.com/2018/12/17/csaw-ctf-crypto-challenge-breaking-dsa/
- **Phying News:** https://phying.com/item/1996