All About Project En-Decrypt✓[on~editing]

Cryptography

Cryptography or cryptology (from Ancient Greek: κρυπτός, translit. kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively) is the practice and study of techniques for secure communication in the presence of third parties called adversaries.

The message you wish to send is converted to a cipher text that appears to be gibberish unless you know the secret to unlocking it.

During World War II the techniques became very sophisticated to the point of needing deep research and having a huge impact in the outcome of the war.

The first use of the term cryptograph (as opposed to cryptogram) dates back to the 19th century—originating from The Gold-Bug, a novel by Edgar Allan Poe.

Today, cryptography is used in our daily life when we send e-mails, messaging apps, or use online payment methods, since it is intimately related to privacy and data protection.

[See picture for the types of cryptography]

There are two kinds of cryptosystems:  symmetric and asymmetric. In symmetric systems the same key (the secret key) is used to encrypt and decrypt a message. Data manipulation in symmetric systems is faster than asymmetric systems as they generally use shorter key lengths. Asymmetric systems use a public key to encrypt a message and a private key to decrypt it. Use of asymmetric systems enhances the security of communication.

Examples of asymmetric systems include RSA (Rivest-Shamir-Adleman), and ECC (Elliptic Curve Cryptography). Symmetric models include the commonly used AES (Advanced Encryption Standard) which replaced the older DES (Data Encryption Standard).