| 2D | Two-Dimensional |
| CPA | Chosen-Plaintext Attack |
| COA | Ciphertext-Only Attack |
| DRPE | Double Random Phase Encoding |
| FFT | Fast Fourier Transform |
| FD | Fourier Domain |
| FT | Fourier Transform |
| KPA | Known-Plaintext Attack |
| JTC | Joint Transform Correlator |
| JPS | Joint Power Spectrum |
| RPMs | Random Phase Masks |
| RMSE | Root Mean Square Error |
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