Objectives of cryptography

In this section, we'll take a look at the four objectives of cryptography.

Confidentiality 

It is also referred to as the privacy or secrecy of information. It maintains information and keeps it safe from unauthorized people. This can be attained through various means, such as by physical methods or through mathematical algorithms. Confidentiality in cryptography can be achieved by using scrambled text, cipher text, or encrypted text. 

Data integrity

This helps to identify the alteration of data services. Data or information may get altered due to attacks by unauthorized people. This service should make sure that the information received by the receiver has not been altered or changed by any means while the information is in transit. Integrity in cryptography is achieved by using hashing.

Authentication

This helps to identify the source of the originator and other fields such as the date and time of creation of the information. This confirms that the receiver of the...