Respuesta :

I believe the answer is  certificate chaining
 certificate chaining refers to the process of verification that rely on the usage of more than one authorization.
This process is widely used in corporations to protect the company against potential data theft.

The process of certificate chaining links several certificates together to establish trust between all the certificates involved.

Explanation:

The issuing authorities of the certificates have links with each other which serve in authenticating the genuineness of certificates issued by them.

An authority would allow the linking of the certificate issued by it with a certificate issued by another authority only if the other authority is authentic and is listed by both the authorities as trustable.