The quantum key distribution (QKD) technology exhibits in the present a series of weaknesses and shortcomings which make it rather hard to be implemented and used on a large scale. Some of these issues and limitations are presented in the first section of the paper. This paper proposes a replacement solution for a QKD based security systems. This solution uses a circuit which generates a square wave signal of ever increasing duration. The duration of the increasing square wave pulses can be modified by adjusting the values of two resistors R2 and R4 as well as by adjusting the value of the capacitor C2 taking values within the intervals specified in the wiring diagram. The encrypted communication is ensured by the use of two distinct identical such circuits, which have the values of R2, R4 and C2 set on the very same values. The generation of the encryption key used in the secret communication, is explained in the paper. This circuit related to the proposed solution has been constructed by the author and it can be seen working in the YouTube video referenced. This hardware can be further expanded in the way it is explained and described in this paper, and such an expanded solution can also be automated using robots and AI instead of being operated by persons. The features and both the upsides and downsides of the solution proposed are also presented in the paper
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