Abstract:

There still exist two problems in the trustworthy interconnection of heterogeneous domains between IBE (Identity Based Encryption) and PKI (Public Key Infrastructure); one is crossdomain authorization, the other is mobile identity. In view of the above mention facts, the authors put forward a solution scheme of the crossdomain authorization among heterogeneous trustworthy domains. In this scheme, PKG (Private Key Generator) is regarded as the agency by its users to register in the PKI domain. Meanwhile CA (Certificate Authority) is regarded as the agency by its users to register in the IBE domain. Therefore, this kind of crossdomain authorization has intact trustworthy links. Finally, conclusion can be drawn that this scheme is fair for users in both PKI domain and IBE domain to crossdomain authorize by analyzing intact trustworthy links.

Key words: identity based encryption (IBE), public key infrastructure (PKI), heterogeneous trustworthy domains, crossdomain authorization