Requirements

You must first create an account to access the content of this website (Absolutely not true, but open the sign-up and login page anyway) Sign Up.

But if you already have an account you can just go ahead and Login.

What is this is about ?

Cryptography is the practise and study of techniques for secure communication in the presence of third parties.

The basic concept is that there are cases when we want to make sure a given message is read by the sender and the receiver exclusively.

That is what we will be seeing in this website. I hope you will enjoy it.

Benefits

We will see the most important cryptosystems that were created in history for both symmetric and asymmetric encryptions. After this you will be able to explain to anyone what is symmetric and asymmetric encryption.

Definitions

PLAINTEXT : the clear message before we encrypt it.

CIPHERTEXT : the message that has been encrypted.

ENCRYPTION : the process of encoding a given message in a way that only the authorized parties can access it.

DECRYPTION : the process of decoding a given ciphertext.

KEY : this is a sequence that is needed both for encryption and decryption.