Meaning of Encryption

What is Encryption:

encryption is a security procedure that consists of the alteration, by means of algorithms, of the data that make up a file. The goal is to render such data unreadable in the event that a third party intercepts it.

encryption It is a widely used resource today to guarantee a secure transfer of data and documents.. Although it cannot be guaranteed that sensitive information will not be stolen, it can prevent it from being used to the detriment of its legitimate owners.

Online banking and merchants use data encryption to prevent the inappropriate handling of their customers’ information (credit card numbers, transaction information, personal data, etc.).

In the same way, many messaging systems use this tool to ensure more secure communications and prevent conversations from being intercepted.

Although the terminology associated with encryption processes is more common with the rise of technology and the need to protect data handled over the Internet, the reality is that techniques have been used for millennia to protect valuable information.

It is known that in ancient times, the Egyptians used encrypted messages, whose data was replaced, altered or permuted, for military purposes.

During World War II, the German military used an encryption machine called Enigma, which allowed them to send and receive sensitive information without detection.

However, the British Alan Turing and his team managed to decipher the encrypted messages, and thereby found the way for the Allies to achieve victory and end the war.

Encryption Types

Encryption methods are classified according to their keys and their algorithms.

You may be interested:  Meaning of Nanotechnology

Encryption according to your keys

Symmetric encryption

Symmetric encryption is one where the same key is used to both encrypt and decrypt data. Some of the most popular symmetric encryption systems are AES (Advanced Encryption Standard), OFF (Data Encryption Standard) and Triple DES.

The Enigma encryption machine was based on a symmetric encryption system.

asymmetric encryption

It consists of a public key to encrypt and a private key to decrypt. The best known methods are ElGamal (named after its creator, Taher ElGamal) and RSA (Rivest, Shamin, and Adleman.).

This method is used to encrypt messages via email.

Encryption according to your algorithms

Stream encryption

Very long keys are used for encryption, which can be predetermined or randomly created using a key generator. In many cases, the message to be encrypted itself forms part of the key, and this must be kept secret.

With this type of encryption, telephone conversations and audio and video applications that operate in real time can be protected.

block encryption

The message or data to be encrypted is broken down into blocks of the same length to proceed with the encryption of each of them. This system, in turn, can be symmetric or asymmetric.

The DES and Triple DES encryption systems use block coding.