---
id: 4544
title: "Reversing a Finite Field Multiplication Optimization"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/reversing-a-finite-field-multiplication-optimization.html"
published_at: "2016-04-19T22:00:00Z"
tags: ["cryptography", "reverse-engineering", "aes-gcm", "optimization", "quarkslab", "finite-fields"]
phying_url: "https://phying.com/item/4544"
lang: en
---

# Reversing a Finite Field Multiplication Optimization

## Summary

Reversing an unpublished optimization for 128-bit finite-field multiplication in AES-GCM: recovering the higher-level algorithm, explaining its constants, and reusing it with other parameters.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2016-04-19T22:00:00Z
- **Original:** https://blog.quarkslab.com/reversing-a-finite-field-multiplication-optimization.html
- **Phying News:** https://phying.com/item/4544