Hybrid key derivation to protect data

According to the data protection method, a processor releases a traditional public key in a traditional certificate and releases a PQC public key in a PQC certificate. The processor encrypts the data using a hybrid shared secret generated with a key derivation function by using a legacy shared secret based on the legacy public key and a PQC shared secret based on the PQC public key. The processor decrypts the data with the hybrid shared secret based on a legacy private key and a PQC private key. The processor signs the data using a legacy signature and a subsequent PQC signature. 一种保护数据的方法，处理器在传统证书中发布传统公钥，在PQC证书中发布PQC公钥。处理器使用混合共享秘密对数据进行加密，所述混合共享秘密通过使用基于所述传统公钥的传统共享秘密和基于所述PQC公钥的PQC共享秘密，利用密钥导出函数生成。处理器基于传统私钥和PQC私钥利用所述混合共享秘密来解密所述数据。处理器使用传统签名以及随后的PQC签名对数据进行签名。