Chosen-plaintext attack on a joint transform correlator encrypting system |
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| Authors: | John Fredy Barrera Carlos Vargas Roberto Torroba |
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| Institution: | a Grupo de Óptica y Fotónica, Instituto de Física, Universidad de Antioquia, A.A. 1226, Medellín, Colombia
b Centro de Investigaciones Ópticas (CONICET LA PLATA-CIC) and UID OPTIMO, Facultad de Ingeniería, Universidad Nacional de La Plata, P.O. Box 3 C.P. 1897, La Plata, Argentina |
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| Abstract: | We demonstrate that optical encryption methods based on the joint transform correlator architecture are vulnerable to chosen-plaintext attack. An unauthorized user, who introduces three chosen plaintexts in the accessible encryption machine, can obtain the security key code mask. In this contribution, we also propose an alternative method to eliminate ambiguities that allows obtaining the right decrypting key. |
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