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+++ title = 'Yali Devlog: Intro' date = 2024-08-06T23:59:59+02:00 tags = ["encryption", "rust"] categories = ["yali"] draft = false summary = "Blazingly 🚀 fast large #️⃣ numbers written in 100% safe Rust 🦀" +++
Introduction
I have always been fascinated by modern encryption. I have tried multiple times to implement RSA.
But I have failed every single time. Why? Because I wrote it in Python I didn't make it blazingly fast by writing it from scratch in 100% safe Rust.
So I started writing my own large int library from scratch. And I am finally able to perform 1024-bit RSA decryption under 500 ms on my desktop computer :)
[svante@desktop-nixos ~/development/yali]$ time target/release/yali
target/release/yali 0,25s user 0,00s system 99% cpu 0,250 total
How did I get here
I started out, thinking it was easy, by just storing all data in a simple Vec<u8>, and using a lot of greedy algorithms.
This was extremely slow, taking multiple seconds just performing RSA encryption.
As I continued, I made a couple of optimisations:
- Implement a more efficient multiplication alogorithm
- Implement a more efficient exponetiation algorithm
- Implement a more efficient division algorithm
And one of the most effective changes was:
Changing the underlying datatype from Vec<u8> to [u8; N]. This avoids allocating memory on the heap every time you perform an operation.
Future plans
In the future, I'm planning to implement:
My current goal is reaching <100 ms.
Bye bye :33