Research Article
A Simple Image Encryption Based on Binary Image Affine Transformation and Zigzag Process
Table 4
Correlation coefficients and entropy information of some nonmedical images.
| | File name | Description | Size | Correlation coefficients between plain and cipher images | Entropy value of plain image | Entropy value of cipher image | Correlation coefficients between plain and decrypted images |
| | 4.1.01 | Girl | 256 × 256 | 3.46e−03 | 7.1835 | 7.9994 | 1 | | 4.1.02 | Couple | 256 × 256 | 1.05e−03 | 6.5007 | 7.9993 | 1 | | 4.1.03 | Girl | 256 × 256 | 6.15e−04 | 5.9549 | 7.9994 | 1 | | 4.1.04 | Girl | 256 × 256 | −2.82e−04 | 7.6031 | 7.9993 | 1 | | 4.1.05 | House | 256 × 256 | 1.95e−03 | 7.0902 | 7.9993 | 1 | | 4.1.06 | Tree | 256 × 256 | −3.07e−03 | 7.5634 | 7.9993 | 1 | | 4.1.07 | Jelly beans | 256 × 256 | −1.85e−03 | 6.6098 | 7.9993 | 1 | | 4.1.08 | Jelly beans | 256 × 256 | 1.44e−03 | 6.8863 | 7.9993 | 1 | | 4.2.01 | Splash | 512 × 512 | 9.15e−04 | 7.3232 | 7.9994 | 1 | | 4.2.02 | Girl (tiffany) | 512 × 512 | −2.28e−03 | 6.6691 | 7.9993 | 1 | | 4.2.03 | Mandrill (a.k.a. Baboon) | 512 × 512 | −5.77e−04 | 7.7659 | 7.9993 | 1 | | 4.2.04 | Girl (lena. or lena) | 512 × 512 | 4.40e−04 | 7.7548 | 7.9993 | 1 | | 4.2.05 | Airplane (F-16) | 512 × 512 | 1.89e−04 | 6.6879 | 7.9994 | 1 | | 4.2.06 | Sailboat on lake | 512 × 512 | 5.04e−03 | 7.7675 | 7.9994 | 1 | | 4.2.07 | Peppers | 512 × 512 | 2.20e−03 | 7.7253 | 7.9993 | 1 | | 5.1.09 | Moon surface | 256 × 256 | −1.16e−03 | 6.719 | 7.9993 | 1 | | 5.1.10 | Aerial | 256 × 256 | 1.71e−03 | 7.322 | 7.9992 | 1 | | 5.1.11 | Airplane | 256 × 256 | −3.61e−03 | 6.4658 | 7.9994 | 1 | | 5.1.12 | Clock | 256 × 256 | 1.95e−03 | 6.7111 | 7.9993 | 1 | | 5.1.13 | Resolution chart | 256 × 256 | −1.47e−03 | 2.2863 | 7.9994 | 1 | | 5.1.14 | Chemical plant | 256 × 256 | 8.36e−05 | 7.3473 | 7.9993 | 1 | | 5.2.08 | Couple | 512 × 512 | −5.45e−04 | 7.2187 | 7.9994 | 1 | | 5.2.09 | Aerial | 512 × 512 | 1.37e−03 | 7.0015 | 7.9994 | 1 | | 5.2.10 | Stream and bridge | 512 × 512 | −1.92e−03 | 7.721 | 7.9992 | 1 | | 7.1.01 | Truck | 512 × 512 | 8.68e−04 | 6.5836 | 7.9993 | 1 | | 7.1.02 | Airplane | 512 × 512 | −3.11e−05 | 5.4408 | 7.9993 | 1 | | 7.1.03 | Tank | 512 × 512 | −1.54e−03 | 6.4078 | 7.9994 | 1 | | 7.1.04 | Car and APCs | 512 × 512 | −1.91e−04 | 6.8064 | 7.9992 | 1 | | 7.1.05 | Truck and APCs | 512 × 512 | −1.27e−03 | 7.1124 | 7.9994 | 1 | | 7.1.06 | Truck and APCs | 512 × 512 | 2.49e−03 | 7.0571 | 7.9992 | 1 | | 7.1.07 | Tank | 512 × 512 | 2.88e−04 | 6.5399 | 7.9993 | 1 | | 7.1.08 | APC | 512 × 512 | −2.56e−03 | 5.9022 | 7.9993 | 1 | | 7.1.09 | Tank | 512 × 512 | 1.01e−03 | 6.9868 | 7.9993 | 1 | | 7.1.10 | Car and APCs | 512 × 512 | −1.11e−03 | 6.6201 | 7.9994 | 1 | | boat.512 | Fishing boat | 512 × 512 | 9.47e−04 | 7.2151 | 7.9992 | 1 | | elaine.512 | Girl (elaine) | 512 × 512 | 5.99e−04 | 7.5118 | 7.9992 | 1 | | House | House | 512 × 512 | 1.67e−03 | 6.5802 | 7.9993 | 1 | | gray21.512 | 21 level step wedge | 512 × 512 | 1.54e−03 | 4.5922 | 7.9992 | 1 | | numbers.512 | 256 level test pattern | 512 × 512 | −1.56e−03 | 7.7768 | 7.9994 | 1 | | | Azafack | 398 × 512 | −1.19e−03 | 7.7018 | 7.9994 | 1 | | | Guefack | 365 × 486 | 8.64e−04 | 6.6996 | 7.9994 | 1 |
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