Vulnerability to chosen-cyphertext attacks of optical encryption schemes based on double random phase keys

Universitat de Barcelona, Departament de FĂ­sica Aplicada i Optica, Diagonal 647, 08028 Barcelona, Spain.
Optics Letters (Impact Factor: 3.18). 08/2005; 30(13):1644-6. DOI: 10.1364/OL.30.001644
Source: PubMed

ABSTRACT We show how optical encryption methods based on double random phase keys are vulnerable to an organized attack of the chosen-ciphertext type. The decryption key can be easily obtained by an opponent who has repeated access to either the encryption or decryption machines. However, we have also devised a solution that prevents the attack. Our results cast doubts on the present security of these techniques.

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    • "Notice that Fourier transform, Fresnel transform and fractional Fourier transform are all special cases of linear canonical transform (LCT) [7] [8], the concept of LCTbased random phase encoding (LCT-RPE) is used to describe the DRPEs based on them. Cryptanalysis on these exploited LCT-RPE systems has been performed and reported, and it has been well known that known-plaintext attack (KPA) [9] [10], chosen-plaintext attack (CPA) [11] [12] [13] and chosen-ciphertext attack (CCA) [14] pose the greatest security threat. To our knowledge, most of the above reported attack schemes are motivating to reproduce the keys of the optical security systems, and each of them can only deal with one specific security system. "
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    Optics Communications 03/2015; 338. DOI:10.1016/j.optcom.2014.10.050 · 1.54 Impact Factor
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    • "Basically, the motivation of cryptanalysis attacks is to retrieve random phase codes [28] [29] [30] [31] [32] [33]. In our presented work, the random phase codes serve as the system locks and are independent of the ID cards. "
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    • "The double random phase encoding (DRPE) technique proposed by Refregier and Javidi [1] is a noteworthy example. However, the DRPE technique and its derivatives [2] [3] [4] have been found to be vulnerable to some attacks [5] [6] [7] [8] [9]. Several approaches [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] have been reported in the literature to overcome the vulnerability of the DRPE scheme. "
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