Which manufacturer's ca does Jiulian Technology set-top box use?

CA manufacturers used by Jiulian technology set-top box include Yongxin Shibo, Digital Video, Tian Bai, etc.

Digital certificate is attached with user information and CA's signature after the user's public key. The public key is one part of the key pair, and the other part is the private key. The public key is public and can be used by anyone. Only you know the private key. Information encrypted with a public key can only be decrypted with the corresponding private key. In order to ensure that only one person can read his letter, the sender should encrypt the letter with the public key of the receiver; The recipient can decrypt the letter with his own private key. Similarly, in order to confirm the identity of the sender, the sender should sign the letter with his own private key; The receiver can use the sender's public key to verify the signature to confirm the sender's identity. You can use digital certificates to verify the identity of the other party in online transactions. Encrypting information with digital certificate can ensure that only the receiver can decrypt and read the original text, as well as the confidentiality and integrity of the information during transmission. Only with digital certificates can we achieve online security and ensure the safety of e-mail, online transactions and credit card shopping.