Key management of the double random-phase-encoding method using public-key encryption

Abstract Public-key encryption has been used to encode the key of the encryption process. In the proposed technique, an input image has been encrypted by using the double random–phase-encoding method using extended fractional Fourier transform. The key of the encryption process have been encoded by using the Rivest–Shamir–Adelman (RSA) public-key encryption algorithm. The encoded key has then been transmitted to the receiver side along with the encrypted image. In the decryption process, first the encoded key has been decrypted using the secret key and then the encrypted image has been decrypted by using the retrieved key parameters. The proposed technique has advantage over double random-phase-encoding method because the problem associated with the transmission of the key has been eliminated by using public-key encryption. Computer simulation has been carried out to validate the proposed technique.

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