---
title: "Discussion on \"What Building a File Encryptor in Rust Taught Me About Authenticated Encryption\" | Hashnode"
description: "Discussion on \"What Building a File Encryptor in Rust Taught Me About Authenticated Encryption\". Building a Rust file encryptor taught me why nonce reuse breaks AES-GCM and why Argon2id beats bcrypt for password-based keys."
url: "https://hashnode.com/posts/file-encryptor-rust-authenticated-encryption/6aafbc77db5f7cf1e27bc0b5"
---

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# [What Building a File Encryptor in Rust Taught Me About Authenticated Encryption](https://quietbytes.hashnode.dev/file-encryptor-rust-authenticated-encryption?utm_source=hashnode&utm_medium=feed)

Building a Rust file encryptor taught me why nonce reuse breaks AES-GCM and why Argon2id beats bcrypt for password-based keys.

Sep 20 · 6 min read · quietbytes.hashnode.dev  
Updated Sep 22  
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## Written by

[Renukashree Murali](https://hashnode.com/@quietbytes)

@quietbytes · Chennai, India

  
[View profile](https://hashnode.com/@quietbytes)

Building defensively. Thinking privately.

Cybersecurity graduate focused into privacy engineering and IAM. I write about the projects I build - what worked, what broke, and what I'd do differently. 👾

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