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In this paper, we propose a secure authentication of the Evolved Packet System Authentication and Key Agreement (EPS-AKA) for the LTE-A network. Our scheme is proposed to solve the problem of sending the IMSI as a clear text, and hence prevents the mobility management entity attack. We will use public key (PK) cryptography to protect the transmitted messages, the RSA scheme computation to compute a temporary value to the IMSI, and nonce to generate challenge messages toward the opposite side. Our scheme does not need to change the original framework and the infrastructure of the LTE-A network, although a ciphered IMSI is transmitted. The authentication procedure is performed by the HSS to authenticate the UEs and the MME; therefore, the impersonating of the MME and UEs is not possible. Our evaluation demonstrates that the proposed scheme is secure and achieves the security requirements of the LTE-A subscribers such as privacy, authentication, confidentiality and integrity. In our scheme, we try to maintain the problems defined in the previous related works.

SEPS-AKA : A Secure Evolved Packet System Authentication and Key Agreement Scheme for LTE - A Networks