Unverified60% confidenceFactExact time
SM2 and SM4 are commercial cryptographic standards formulated by the State Cryptography Administration of China.
2
Sources
60%
Confidence
Long-term
Relevance
7/18/2026
First Seen
Sources
Related Claims
UnverifiedWhen SM2 and SM4 are used in combination, SM2 is responsible for securely transmitting the SM4 key while SM4 is responsible for efficiently encrypting the actual data, forming a hybrid encryption architecture82% similarUnverifiedSM4 is a block symmetric encryption algorithm with both a key length and block length of 128 bits, and it is widely deployed in domestic financial and government systems79% similarUnverified国密算法是中国国家密码局自主研发并推行的商用密码标准体系75% similarVerifiedSM2 is based on elliptic-curve cryptography (ECC) with a key length of 256 bits; its security is equivalent to RSA-2048 but with higher computational efficiency, and it is commonly used for digital signatures and key exchange72% similar
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