Digital archives are stored on computers or network servers, making them vulnerable to unauthorized access, theft, or tampering by hackers. In order to achieve a more efficient and secure encryption and decryption process of digital archive information, a security protection method of digital archive information based on state secret algorithm is studied. The concept of component and hierarchical design is adopted to build a digital archive data warehouse. Before the transmission of digital archive information data, the sender generates a random Symmetric Block Cipher Algorithm )SM4( key and encrypts it using the SM2 algorithm. Use the SM2 algorithm to decrypt the random key, and then use the SM4 algorithm to decrypt the ciphertext. The SM2 hybrid state secret algorithm is used to establish the authentication mechanism of the archive system and set digital certificates to ensure the consistency of information encryption. The experimental results show that the algorithm has higher encryption efficiency and advantages of digital archive information, can effectively block malicious acts, and ensure the security of digital archive information.

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