22Nis
What is the use of cross signing certificates in X.509?
In X.509 architecture what are the uses of cross signing certificates from other hierarchy?
Does it just expand trust?
So from the answer I am assuming that if CA3 is cross signed by CA2 (from another hierarchy) and CA1 (a parent in its own hierarchy) whose private key is used to encrypt the authentication hash in the certificate of CA3?
