In the digital era, data breaches and communication eavesdropping are constant threats, making cryptography the bedrock of network security. This article compares two major cryptographic families: the globally dominant RSA/AES and China's national standards SM2/SM4. SM2, an elliptic curve public-key algorithm, offers stronger security per key bit compared to RSA, while SM4 is a symmetric block cipher designed for efficiency in software and hardware. For developers and security engineers working in or with China, understanding these standards is crucial for compliance in sectors like finance, government, and energy. The article explains key technical differences, such as key sizes and performance, and outlines the regulatory landscape that mandates SM2/SM4 adoption in certain contexts. This knowledge helps global teams build systems that are both secure and compliant when operating across borders.
A detailed comparison of Chinese national cryptographic standards SM2/SM4 with international standards RSA/AES, covering technical advantages, security, and compliance.