Introduction to Cryptography

In this class, we will discuss the introduction to cryptography.

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This class is our first class on cryptography.

We provided a few thoughts in this class to help us understand the next classes.

Where cryptography is needed?

Example:

We want to send a message to our friend or other person.

We use any electronic device to open an application and send a message.

The message flows on the internet.

The message is ” Today is the blast”.

The internet is open to all.

The attacker or a hacker will stay on the internet and check your messages.

We need to send a message which is not understandable to attackers.

The above is the situation where cryptography is used.

Cryptography: This is a process of hiding the information so that only the person expected to see the message can read it.

The two points one should understand.

1) We use a technique or mathematical logic to convert the data.

2) The mathematical logic should be complex enough so attackers can not convert to actual data.