Basic Importance Of Cryptography

Cryptography is a science or art that protects data and information from unwanted intruders through transforming the information to a format that is unreadable. The people with the required authentication are the only ones can read or return the data to original form. It is a system dependant mainly on the usage of a key and the main basic principle of network security.
Cryptography involves plain text, which is the text that someone will type in a form that is understandable to the human. This plain text will then undergo encryption, which is a technique that converts plain text into a form that is not understandable called cipher text. The cipher will then undergo transmission towards the receiving party. A particular encoding method forms the basis for choosing series of numbers or letters that thereafter form a key. This will form the basis for encryption and …show more content…
Cryptography plays an essential role in this in three different ways. Firstly, it ensures confidentiality because only the receiver and sender are capable of comprehending the message. The principles of decryption and encryption ensure the achievement of this role. Secondly, it ensures authentication because both the receiver and sender have to confirm that each of them is as they claim to be and the right person whom communication is intended for. The fit is possible through digital signatures principles. Thirdly, cryptography ensures message integrity. If poor security is present, the integrity of data may be lost even after authentication. Cryptography alongside the hash function ensures that messages retain their integrity by eliminating accidental or malicious altering. However even with the confirmation of confidentiality, message integrity and authentication the security is still imperfect with the necessary access control, which is under provision by gateway applications such as firewalls and package