Table 15 Complexity Comparison of Encryption Algorithms.

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

Algorithm

Rounds

Key Schedule

Operations per Round

Total Complexity

TEA

64

O(1)

O(4)

O(256)

Speck

32

O(n)

O(4)

O(128)

PRESENT

31

O(n)

O(5)

O(155)

TTEA

20

O(1)

O(3)

O(60)