Encryption Overview

Question 1

What does Encryption provide?

Answer 1

Confidentiality

Question 2

What do Digital Signatures provide?

Answer 2

Non-repudiation (can’t deny you sent something)

Question 3

What type of encryption protects integrity to make sure there hasn’t been modifications to the data/information?

Answer 3

Hashing

Note: Hashing is one way encryption used for comparison. The same input will always output the same unique hash value.

Rainbow tables can be compared to hashes in order to figure out the original message.

Question 4

In what type of encryption do both sides have the same key to encrypt and decrypt the package?

Answer 4

Symmetric

Question 5

What type of encryption provides easy and fast computational process which make it good for large volumes of information?

Answer 5

Symmetric

Question 6

What are the 7 common symmetric algorithms?

Answer 6

3DES (Triple Data Encryption Standard) (Being retired in 2023)
AES (Advanced Encryption Standard)
Blowfish
Twofish
RC4
RC5
RC6

Question 7

What encryption method uses both a public and private key, solves key sharing problems and needs heavy computational power making it bad for heavy volumes of cryptographic information?

Answer 7

Asymmetric

Question 8

Common Hashing Algorithms

Answer 8

MD2 (128)
MD4 (128)
MD5 (128)
SHA-1 (160)
SHA-2 (224, 256, 348, 512)
SHA-3 (224, 256, 348, 512)
RIPEMD (128, 256, 320) 

All MD’s are weak, SHA-1 is Weak, RIPEMD 128 is Weak