Jiao Shuming, Li Guowei, Zhou Changyuan, Zou Wenbin, Li Xia
J Opt Soc Am A Opt Image Sci Vis. 2018 Jan 1;35(1):A1-A6. doi: 10.1364/JOSAA.35.0000A1.
In this paper, a special ciphertext-only attack (COA) scenario to the traditional double random phase encoding (DRPE) technique is proposed based on plaintext shifting. We assume the attacker can illegally manipulate the DRPE system to gain multiple ciphertexts from randomly shifted versions of the same plaintext. The plaintext image can be recovered when our proposed scenario is combined with a speckle correlation attacking method proposed in previous work. Simulation results demonstrate that our proposed scheme can successfully crack the DRPE system even when the speckle correlation method alone fails to work in the conventional single ciphertext scenario due to the small size of the plaintext image. The work in this paper reveals a severe security flaw of DRPE systems when minor position shifting of the plaintext occurs.
本文基于明文移位提出了一种针对传统双随机相位编码（DRPE）技术的特殊唯密文攻击（COA）场景。我们假设攻击者可以非法操纵DRPE系统，从同一明文的随机移位版本中获取多个密文。当我们提出的场景与先前工作中提出的散斑相关攻击方法相结合时，明文图像可以被恢复。仿真结果表明，即使在传统的单密文场景中，由于明文图像尺寸较小，仅散斑相关方法无法奏效时，我们提出的方案仍能成功破解DRPE系统。本文的工作揭示了明文发生微小位置移位时DRPE系统存在的严重安全漏洞。
