SM4 Encryption/Decryption Online
Online SM4 block cipher encryption tool. Chinese national standard symmetric encryption algorithm with multiple operation modes.
Configuration
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Encryption/Decryption
Plaintext Format:
Ciphertext Format:
About SM4
What is SM4?
SM4 is a block cipher algorithm with 128-bit key length and block size.
Operation Modes
ECB mode is simple but less secure. CBC mode provides better security.
Applications
Widely used in Chinese financial systems and government applications.