Figure 1.
Figure 2.
Comparison according to Techniques
| Image Scrambling: |
| Authors Referred: [2], [4] |
| Algorithms Used: Rubic’s Cubic algorithm and Arnold Transformation, Arnold Scrambling |
| Pros: Simple and easy to work |
| Cons: Uses basic methods so need of more efficiency is there |
| Efficiency (Comparatively): Has some negative effects and termed as not much efficient |
| Bit Plane: |
| Authors Referred: [3] |
| Algorithms Used: Image encryption algorithm using Bitplane, Arnold Scrambling |
| Pros: Similar to Image Scrambling |
| Cons: Even after doing this, confusion exists in the model |
| Efficiency (Comparatively): Efficient when considered with Image Scrambling |
| Cryptography: |
| Authors Referred: [12] |
| Algorithms Used: An algorithm based on Chaos and improved DES |
| Pros: Familiar approach but various techniques |
| Cons: Encryption can be done using various methods where some are not satisfactory |
| Efficiency (Comparatively): More than Steganography |
| Steganography: |
| Authors Referred: [1], [14], [15] |
| Algorithms Used: Embedding and Extracting algorithm, Caesar/Vigenère cipher |
| Pros: Easier to understand and does the necessary correctly |
| Cons: Old style method of encryption |
| Efficiency (Comparatively): Not much when compared with cryptography |
| Blockchain: |
| Authors Referred: [5], [6], [7], [8], [9], [10], [13], [16], [17] |
| Algorithms Used: Blockchain technology, Steganography |
| Pros: Can extend to save more details |
| Cons: Requires additional storage space |
| Efficiency (Comparatively): Efficient when taken alongside other technologies |
Comparison according to Metrics
| Accuracy: |
| Image Scrambling: Higher compared to other techniques |
| Bit Plane: Not much since this is used along with Image scrambling |
| Cryptography: Higher compared to other techniques |
| Steganography: Higher compared to other techniques |
| Blockchain: Higher compared to other techniques |
| Efficiency: |
| Image Scrambling: More efficient in terms of small images |
| Bit Plane: Doesn’t matter since always used with Image scrambling |
| Cryptography: More efficient and used since a very long time |
| Steganography: More efficient compared to other techniques since protection is higher |
| Blockchain: Efficient in terms of medical images as mostly used there |
| Reliability: |
| Image Scrambling: Reliable but not as much as the latest technologies |
| Bit Plane: Not much when compared to other techniques |
| Cryptography: Reliable because of Security features embedded |
| Steganography: Reliable since it uses password for protection |
| Blockchain: Reliable when information is not much confidential |
| Security: |
| Image Scrambling: Secures the image |
| Bit Plane: Not much since this is used along with Image scrambling |
| Cryptography: Higher for the embedded data |
| Steganography: Higher for the embedded data but then image is also password protected |
| Blockchain: Higher for the embedded data than the image |