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Table 2 This table illustrates ENT randomness test results of the randomized plaintext, the ciphertext, and the ciphertext that was acted on with Hermitian conjugate of the superposition operator against the optimal parameters’ values

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

Parameters

Optimal values

Randomized plaintext

The ciphertext that was acted on with \(\hat{H}^{\dagger}\)

Ciphertext

Entropy

7.999999

7.981399

7.983467

7.982688

Chi-square

256

283.07

250.18

262.26

Arithmetic Mean

127.5

127.2537

126.5289

127.7734

Monte-Carlo π

3.141592653

3.089324619

3.130718954

3.135076253

Serial Correlation Coefficient

0.0

−0.024435

−0.025627

0.000079