Encryption

What is Encryption?

Main Types of Encryption

Symmetric Encryption Asymmetric Encryption Hashing

Symmetric Encryption ?

Text

Cipher Algorithm

SharedKey

Encrypted

Text

Cipher Algorithm

Shared Key

Decrypted

TextText

Symmetric Encryption

Symmetric Encryption-Uses

Cloud backup Services To encrypt computer or storage device To create secure Channel between two endpoints

Symmetric Encryption-Drawbacks

Encryption becomes useless Attacker gains the key over network Software or Platform itself is compromised

Text

Cipher Algorithm

Public / Private Key

Encrypted

Text

Cipher Algorithm

Private / Public

Key

Decrypted

TextText

Asymmetric Encryption ?

Asymmetric Encryption

Asymmetric Encryption-Uses

TLS (Transport layer Security) SSH (Secure Sockets Layer) In Email

Asymmetric Encryption-Drawbacks

Main problem trusted public key Man in Middle

Hashing ?

Data Storage String or Number Fixed length Result vary widely with small variations in input

Hash Encryption ?

Hash Encryption

Properties the same data will always produce the same hash it’s impossible to reverse it back to the original data

it’s infeasible to create another string of data that will create the same hash

Hash Encryption-Uses

Passwords Files

Hash Encryption-Weakness

Impossible to reverse a hash

Costs a lot to find a collision for

Difference b/w Encryption vs Hashing

Hashing

Difference b/w Encryption vs Hashing

Encryption