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Compare and contrast DES and AES.

written 6.4 years ago by teamques10 ★ 70k

modified 3.7 years ago by pedsangini276 • 4.8k

cryptography and network security

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written 6.4 years ago by teamques10 ★ 70k

Comparison	DES	AES
Basic	In DES the data block is divided into two halves	In AES the entire data block is processed as a single matrix
Principle	DES work on Feistal Cipher Structure	AES works substitution & fermutation principle
Plain text	Plaintext is of 64 bits	Plaintext can be of 128, 192, 256 bits
Key size	DES in comparison to AES has smaller key size	AES has larger by size as compared to DES
Rounds	16 rounds	10 rounds for 128 bits, 12 rounds for 192 bits, 14 rounds for 256 bits
Rounds names	Expansions fermutation Xor, S-box,P-box,Xor and Swap	Subtypes, Shiftonce , Mix columns , Addroundkeys
Security	DES has a smaller key which is less secure	AES har larger secret key comparatively hence more secure.
Speed	DES is slower	AES is faster

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