Quantum kernel as an indicator of secure classical message coded in a quantum string

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In this study, the quantum kernel is utilized as an indicator of the security of encoded information within classical strings. The impact of the Hadamard gate on the behavior of single, control, and all quantum strings is analyzed. To illustrate this concept, two distinct classical strings are examined. Our findings reveal that the position of the string significantly influences the level of security of the encoded information, depending on whether it acts as a control or target string. Furthermore, the quantum string's capacity remains almost stable when it functions as a target string during the entanglement process, whereas an unstable behavior is observed when it serves as the control string.