The diffractive imaging-based encryption (DIBE) is vulnerable to chosen plaintext attack (CPA) because of the direct relation between plaintext and ciphertext. In this paper, a HYBRID method, which consists of combining simplified diffractive imaging-based encryption (SDIBE) and data hiding method, has been developed for safe data transmission. While the method has basic features of DIBE due to the SDIBE, it has higher security thanks to data hiding step which hides CCD pattern to a random noisy carrier with large size. As a result of the hiding, CPA has become unavailable anymore by preventing the direct connection between plaintext and ciphertext. The large size of the carrier and additional keys provide a huge key space which protects the method to brute force attacks. Moreover, resistance of the hybrid method against known-plaintext attack (KPA) and ciphertext only attack (COA) is high due to the nonlinearity of the SDIBE and using of public and private keys. In addition, while the hybrid method brings a different approach to DIBE, it also provides that more than one different data transmission can be made in a single carrier. Numerical simulations are presented to test the security and feasibility.

由于基于明文和密文的直接关系，基于衍射成像的加密（DIBE）容易受到选择的明文攻击（CPA）。本文提出了一种结合了基于衍射成像的简化加密（SDIBE）和数据隐藏方法的HYBRID方法，以实现安全的数据传输。尽管该方法由于具有SDIBE而具有DIBE的基本特征，但由于数据隐藏步骤将CCD模式隐藏到大尺寸的随机噪声载波上，因此该方法具有更高的安全性。隐藏的结果是，通过防止明文和密文之间的直接连接，CPA不再可用。携带者的大尺寸和附加钥匙提供了巨大的钥匙空间，可以保护暴力攻击的方法。此外，由于SDIBE的非线性以及使用公钥和私钥，混合方法对已知明文攻击（KPA）和仅密文攻击（COA）的抵抗力很高。另外，尽管混合方法为DIBE带来了不同的方法，但它还提供了可以在单个载波中进行多个不同数据传输的功能。数值模拟被提出来测试安全性和可行性。