4. Encryption and Decryption

What is it?

  • Process designed to secure data from unauthorised access
  • Software program applies a mathematical formula to the data and then creates a key to unlock the code

Cryptography

The science of developing and analysing encryption and decryption technologies is called cryptography.

Encryption:

The process of making data unreadable by those who do not possess the decryption key.

Decryption:

The process of decoding encrypted data using a key.  The opposite of encryption

Simpler explanation:

public key cryptography.mp4


More complicated explanation:

Symmetric Key and Public Key Encryption


Detailed explanation:

Cryptography 101 - The Basics


What is Secure Sockets Layer:
Uses Encryption for Internet Traffic

SSL Certificate Explained