Known-plaintext attack on a joint transform correlator encrypting system.
We demonstrate in this Letter that a joint transform correlator shows vulnerability to known-plaintext attacks. An unauthorized user, who intercepts both an object and its encrypted version, can obtain the security key code mask. In this contribution, we conduct a hybrid heuristic attack scheme merge to a Gerchberg-Saxton routine to estimate the encrypting key to decode different ciphertexts encrypted with that same key. We also analyze the success of this attack for different pairs of plaintext-ciphertext used to get the encrypting code. We present simulation results for the decrypting procedure to demonstrate the validity of our analysis.
Grupo de Óptica y Fotónica, Instituto de Física, Universidad de Antioquia, A.A 1226 Medellín, Colombia. jbarrera@fisica.udea.edu.co
John Fredy
JF
Barrera
Carlos
C
Vargas
Myrian
M
Tebaldi
Roberto
R
Torroba
Nestor
N
Bolognini