Research Article
Cryptographic Strength Evaluation of Key Schedule Algorithms
Table 4
Results of low/high-density keys test.
| | Test name | AES | Serpent | PRESENT | IDEA | Twofish | | LDK (%) | HDK (%) | LDK (%) | HDK (%) | LDK (%) | HDK (%) | LDK (%) | HDK (%) | LDK (%) | HDK (%) |
| | Frequency test | 98.28 | 99.36 | 98.77 | 99.02 | 0.00 | 0.00 | 0.00 | 0.00 | 99.22 | 98.17 | | Block frequency test | 98.20 | 99.47 | 98.25 | 99.22 | 0.00 | 0.00 | 0.00 | 0.00 | 99.81 | 99.67 | | Cusum test, forward | 98.50 | 99.41 | 98.16 | 99.13 | 0.00 | 0.00 | 0.00 | 0.00 | 98.44 | 99.00 | | Cusum test, backward | 98.46 | 99.43 | 99.00 | 99.13 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 98.53 | | Runs | 98.30 | 98.00 | 98.20 | 99.01 | 0.00 | 0.00 | 0.00 | 0.00 | 97.66 | 1.00 |
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