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Table 1 This table illustrates ENT randomness test results of the original plaintext, the randomized plaintext, the superposed randomized plaintext, and the ciphertext against the optimal parameters’ values

From: Quantum encryption of superposition states with quantum permutation pad in IBM quantum computers

Parameters

Optimal values

Original plaintext

Randomized plaintext

Superposition states

Ciphertext

Entropy

7.999999

7.864182

7.981399

7.983191

7.982688

Chi-square

256

2403.83

283.07

254.31

262.26

Arithmetic Mean

127.5

122.9132

127.2537

126.4969

127.7734

Monte-Carlo π

3.141592653

3.213507625

3.089324619

3.102396514

3.135076253

Serial Correlation Coefficient

0.0

0.088383

−0.024435

0.001690

0.000079