Flowchart

Ch 20 Encryption

Alexey - English

Flowchart content

Block Encryption Algorithms
DES
3DES or Triple DES
AES
Symmetric Stream Algorithms
RC4
Symmetric Encryption
Application:
Cryptography
Types of operations
Number of keys used
text processing type
Substitution (Confusion)
Transposition (Deffusion)
single-key, symmetric, secret-key, conventional
two-key, asymmetric, public-key
stream cipher
block cypher
Modes of Operation
Electronic Codebook
Cipher Block Chaining
Cipher Feedback
Counter
Plaintext: 64 bit
Key: 56 bit
Blocks: 64 bit
16 Rounds
16 Subkeys
Follows FCS closely
Feistel Cipher Structure
Plaintext: 64 bit
Key: 168, 112 bit
Blocks: 64 bit
16 Rounds
16 Subkeys
Does DES 3 times
Plaintext: 128 bit
Key: 128, 192, 256 bit
Blocks: 128 bit
10,12,14 Rounds
44 Subkeys
New Matrix algorithm
Different decryption alg.
A block of text encoded with the same key intependantly
not used
encoding of XOR of previous sypher text and new plane text block
rarely used
encrypt counter
convers to stream sypher
Galois Counter
Counter mode with message authentication
most internet traffic is this plus AES as encryption alg
Converts to stream cypher
Hash Functions
Asymmetric Encryption
Applications
Key management
Digital signatures
Applications

Description: Flowchart on Ch 20 Encryption, created by Alexey - on 08/12/2022.
Created by: Alexey -
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