The digital certificate uses a third-party organization to impartiality to the public key, thereby ensuring the non-repudiation of data transmission. Therefore, only the certificate of the communicating party is required to confirm the correctness of the public key.

IPSec VPN uses an asymmetric algorithm to calculate the ______ key to encrypt data messages.

Regarding the matching conditions of the security policy, which of the following options are correct? (Multiple Choice)

NAT technology can realize data secure transmission by encrypting data.

In the user management of Huawei firewall, which of the following categories are included? (Multiple choice)