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.

The tools on this site are strictly prohibited for illegal purposes. We do not bear any losses and responsibilities caused by using the tools.
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