Known-plaintext attack on double phase encoding encryption technique
Peng Xiang, Peng Zhang, Wei Heng-Zheng, Bin Yu, (1)深圳大学光电子学研究所，教育部光电子器件与系统重点实验室，深圳 518060; (2)深圳大学光电子学研究所，教育部光电子器件与系统重点实验室，深圳 518060;天津大学精密测试技术及仪器国家重点实验室，天津 300072; (3)天津大学精密测试技术及仪器国家重点实验室，天津 300072 · Acta Physica Sinica · 2006
In the field of optical information security, the most attractive work is the so-called double-random-phase encoding encryption scheme proposed by Javidi. However, the security of this cryptosystem has not been analyzed thoroughly from the point of view of cryptoanalysis. In this article, the weakness of Javidi's optical security system is carefully analyzed with a known-plain text attack. It is shown that the double-random-phase encoding encryption scheme is a linear symmetric block cipher cryptosystem and its linearity opens avenues of attacks. Under the known-plaintext attack, attacker can obtain the phase key(s) in the input plane using the typical phase retrieval algorithms and subsequently deduce the phase key(s) in the Fourier domain easily. In addition, an optical implementation of known-plain text attack is also proposed.