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IP pre?x hijacking is one of the top threats in the cloud computing Internets. Based on cryptography, many schemes for preventing pre?x hijacks have been proposed. Securing binding between IP pre?x and its owner underlies these schemes. We believe that a scheme for securing this binding should try to satisfy these seven critical requirements: no key escrow, no other secure channel, defending against Malicious Key Issuer (MKI) in the phase of pre?x announcement, defending against MKI in the phase of key issuing, no certi?cate, in-band delegation attestation, and in-band public key witness. In this paper, we propose a new scheme, Origin Authentication based on Self-Certi?ed public keys (SC-OA), using self-certi?ed public keys to authenticate origin autonomous systems. To the best of our knowledge, it is the ?rst work for securing pre?x ownership using self-certi?ed public keys to achieve an ef?cient and secure scheme that satis?es all seven requirements. The analyses show that SC-OA can defend against regular pre?x, subpre?x, unassigned pre?x, interception-based, and MKI hijacking, and improve performance in many aspects. It will be pushed ahead to practical deployment for preventing pre?x hijacks.

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