Encryption and Decryption

Hello friends, today we are going to talk about Encryption and Decryption…

Encryption

Encryption is actually a process of converting a data into such a manner that no one can read or access it except the authorized ones. In the process of encryption, the message or information gets encoded. That encoded information will not be access by anyone. The message or information which is encrypted is known as PlainText. A Cipher is the encrypted algorithm which is used in the process of encryption, means the PlainText (information) is encrypted by Cipher. After then, the PlainText converted into the CipherText, it can only be read by others when it will Decrypted.

In simple language, unencrypted data is known as PlainText, the process is known as Cipher and the result of the Cipher process is known as CipherText, which is actually an encrypted data. Cipher and Code is almost the same things, in both cases the message is encrypted. The encrypted data can only be read by using the key which made it readable for other users.

 Encryption process is not new it was used in ancient time also. For example, Romans and Greeks also sent some secret messages in some unreadable codes. Just like nowadays, the message or information is converted into some unreadable form.

Simple Example for Better Understanding

To understand how this encryption process works, let’s take a simple example:

Firstly we will give every alphabet a unique sign. For example, if you want to write ‘A’ then you will write it ‘Z’, and if you want to write ‘Z’ then you will write ‘A’. To understand it better see the below table.

Here is a list of commonly used words with their code:

SIMPLE:  ABCDEFGHIJKLMNOPQRSTUVWXYZ

CODE:     ZYXWVUTSRQPONMLKJIHGFEDCBA

So according to the above table, if you want to write ‘NEXTISEASY’ then you will write ‘MVCGRHVZB’. This is how the encryption process works. The word NEXTISEASY can be read by anyone but no one can read that CODE which we have written in the place of NEXTISEASY.

Key

Key is very important in order to encrypt the data.  Key is used to unencrypt or encrypt the data known as Shared Key. A Shared Key is distributed to one or two people and those people can use their specific key to read the encrypted data or to encrypt the data. This means that the PlainText can be converted into CipherText or CipherText can be converted into PlainText by using Key.

Decryption

Decryption is the process of changing that unreadable format of data, known as CipherText, into the readable form of data, known as PlainText.  In Decryption, the computer transforms the data which was encrypted. Decryption can be done by using the Key.

Why Encryption?

The main purpose of the Encryption is to secure the confidential data by the attackers. Many organizations have very sensitive data to store so they encrypt that data to prevent their data from the hackers or to be used by others for some illegal works. Many governments use encryption process. Mostly payment card industries use this encryption process to protect their customers’ data because they (their customers) use their cards for payment in many sites so there are many chances that their ID will be hacked or steal, to prevent the spreading or hacking or stealing of their customers’ data they use encryption.

By 1970s, the encryption was only used by some governments to keep their files and information secure but in this modern era, some products or industries are now totally depend on this encryption. Some devices like set—top boxes, modems etc. use encryption process to provide best function. Even your smartphones and SIMs somehow use encryption process to give you best results with security. Every time you use the ATM you are using the process so-called encryption.

As we know that the Cyber Attacks are increasing every single day. So the need of Encryption is also increasing. Encryption can be used in any type whether it is your images on system or your emails in your account or your files or your any specific data etc. May be encryption is not 100% secure but it decrease the chances of attacks.

If you have any question or suggestion then please free to comment below... and Thanks for Reading...