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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?

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  • $\begingroup$ Of course you can sign the MPK with some private key to produce a certificate, but are you asking to integrate it into the existing PKI on the web? You can try to find a certificate authority which signs arbitrary data (which this is). $\endgroup$ – Artjom B. Aug 5 '17 at 13:29
  • $\begingroup$ @Artjom can you give me an example of CA that signs arbitrary data? Can I use OpenSSL? $\endgroup$ – CipherX Aug 6 '17 at 17:46

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