If You Don’t Want AES and ChaCha20 … There’s SM4
2 min readOct 9, 2021
While AES has been proven to be secure, it hasn’t stopped Google from promoting ChaCha20. While AES is highly secure, in some applications it is perhaps too resource-intensive for some devices. ChaCha20 — a stream cipher — often has lesser processing requirements. So while AES and ChaCha20 are popular, in China, OSCCA (Organization of State Commercial Administration of China) has also authorized SM4 for…