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. Public key encryption method contrasts with traditional encryption method has the advantage of very powerful, especially in applications and network security. With the development of these years public key encryption method is a mature, open, standard security mechanism for network encryption and digital signatures. The key exchange plays an important role in cryptography. It is an important research issue that how to ensure the security of key exchange. In this paper we present a key exchange method based on multivariate public key cryptography.

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