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The optical image encryption has attracted more and more researchers' attention, and the various encryption schemes have been proposed. In existing optical cryptosystem, the phase functions or images are usually used as the encryption keys, and it is difficult that the traditional public-key algorithm (such as RSA, ECC, etc.) is used to complete large numerical key transfer. In this paper, we propose a key distribution scheme based on the phase retrieval algorithm and the RSA public-keydoi:10.1155/2015/732609 fatcat:6avbckgwbnhctlsfh4nwr5zbsu