Table 2 Nomenclature and Definitions14,15,16.

From: TTEA: designing a quantum-ready and energy-conscious encryption model for secure IoT environments

Symbol/Abbreviation

Definition

M

Input plaintext message (ASCII string).

A

Set of ASCII integer equivalents of M.

C

Final ciphertext.

m

A single plaintext byte.

\(X=\{x_1,x_2,x_3\}\)

Initial random values from A.

\(k_i\)

Intermediate keys after XOR.

\(k\prime _i\)

Intermediate keys after S-Box.

\(k\prime \prime _i\)

Keys after dynamic shifting.

\(K_L\)

Long-term lattice-based key.

\(K_E\)

Ephemeral session key.

\(K_{\text {final}}\)

Final encryption key.

\(\oplus\)

Bitwise XOR.

\(S_{\text {bit}}(\cdot )\)

20\(\times\)20 S-Box substitution.

Shift(ks)

Bitwise shifting of key k by s.

KDF(\(\cdot\))

Key Derivation Function.

IoT

Internet of Things.

PQC

Post-Quantum Cryptography.