The thing about Speck is a shame if it turns out that it's a good cipher. Speck is trivial to implement, has decent performance and doesn't rely on S-Boxes. It'

The thing about Speck is a shame if it turns out that it's a good cipher. Speck is trivial to implement, has decent performance and doesn't rely on S-Boxes. It's basically all anyone could ever ask for and a design I can very much appreciate. As a block cipher, it has different trade-offs than the djb ARX ChaCha20, which is a stream cipher.