PalletOne has implemented the digital identity certificate self-signing function based on the national secret algorithm, including certificate chain, certificate query, and so on. The implementation of this function enables users to use their own private key to sign the certificate and realize the binding of the chain on the digital identity certificate and the identity of the blockchain.  

National secret algorithm is a series of data encryption processing algorithms independently developed and innovated by our country. The algorithm functions of symmetry, asymmetry and summary are realized from SM1-SM4. It is especially suitable for embedded internet and other related fields to complete identity authentication and data encryption and decryption and other functions. 

In digital identity system, blockchain technology provides a relatively credible solution to some extent, which enables users to protect their privacy while having digital identity, and only specific organizations or individuals are allowed to access, store, analyze or share personal data, etc.