Security and Encryption - Revision

What is Encryption?

A way to send data securely to other people or locations

You must have the key or password to decrypt or open the files

If the data is encrypted, it's called plain text

Why do we need encryption?

We need to protect the files and data we create and send across the "The World Wide Web"

It stops malicious malware or hackers receiving the data in plan text or files and then being used against the owners wishes

Types of Encryption

MD5

MD5 is the most widely used cryptographic al algorithm to encrypt data and stores the data in a 32 hexadecimal number, it can also be used to verify data integrity.

SHA-2

SHA-2 is a type of encryption designed by the United States National Security Agency, and is commonly used a way to process the data securely, but is considered insecure against well-funded opponents.

Examples when security wasn't in place.

Sony

2011