SPECK is a lightweight block cipher. It’s an ARX cipher, making it easy to implement in constant-time code.
Here’s one round of encryption with SPECK.
fn ernd(x: u64, y: u64, k: u64) -> (u64, u64) {
let mut x = x;
let mut y = y;
x = x.rotate_right(8);
x = x.wrapping_add(y);
x ^= k;
y = y.rotate_left(3);
y ^= x;
(x, y)
}
@article{yaltirakli, title = "SPECK cipher", author = "Yaltirakli, Gokberk", journal = "gkbrk.com", year = "2024", url = "https://www.gkbrk.com/speck-cipher" }
Gokberk Yaltirakli, "SPECK cipher", July, 2024. [Online]. Available: https://www.gkbrk.com/speck-cipher. [Accessed Jul. 24, 2024].
Yaltirakli, G. (2024, July 24). SPECK cipher. https://www.gkbrk.com/speck-cipher
Gokberk Yaltirakli, SPECK cipher, GKBRK.COM (Jul. 24, 2024), https://www.gkbrk.com/speck-cipher
