Page 111 - Cyber Defense eMagazine January 2023

S = pla int ext (10)

where such a core element of the matrix is applied to transmit some plaintext information.

Indeed, it’s obvious that such a simple mathematical model which can be coded is proposed through this
effort. Similar approach can be used in combined encryption so far where the core signal would be some
encrypted content serving in secret data exchange. From a programming point of view, it’s logical that
some clever coders can cope with such a mathematical modelling in order to conduct such a serious
defense engineering project.

Combined crypto-system

Combined cryptography is a good mix of E2E and link encryption which takes advantages of both military
encryption cases. In other words, it’s more like a link encryption mathematical model where a core
element of the diagonal square matrix is a ciphertext instead of the plaintext. The graphical illustration of
such a communication is given in Figure 3 as follows.

Figure 3 – Combined encryption grid

Presently, combined encryption has some weaknesses as if not applied active high-tech security there
could be some issues with the endpoint assurance. For such a reason, it’s needed to work hard on some

Cyber Defense eMagazine – January 2023 Edition 111
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