Lightweight Cryptographic Algorithms for Guessing Attack Protection in Complex Internet of Things Applications

Table 2

Comparison between DES, Triple DES, and IDEA.

	DES	Triple DES	IDEA
Key size	56 bits	112 (2TDES) or 168 bits (3TDES)	128 bits
Block size	64 bits	64 bits	64 bits
Structure	Feistel network	Feistel network	Substitution-permutation network
Round used	15	48	8.5