I am currently working on CipherText Policy Attribute Based Encryption (CP-ABE) scheme. If we see the scheme, we can notice that the Authority may generate a Master Public Key and a Master Private Key(this last used to generate the user's secret keys).
Now, is there a possibility in order to certificate this Master Public Key generated with Pairing(i.e. using a X.509 certificate or similar)? How can I trust of this MPK?