Unverified60% confidenceFactExact time
When 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 architecture
2
Sources
60%
Confidence
Long-term
Relevance
7/18/2026
First Seen
Sources
Related Claims
UnverifiedSM2 and SM4 are commercial cryptographic standards formulated by the State Cryptography Administration of China.82% 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 systems81% 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 exchange73% similarUnverifiedSM4 is a 128-bit block symmetric encryption algorithm that supports multiple modes of operation such as ECB, CBC, and CTR, and is comparable to AES-128 in security strength.73% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/550764API
curl https://kongchang.com/api/v1/knowledge/claims/550764MCP
get_claim(id=550764)