By Kajal Chaudhari

Roll No.: 30

Cryptography in networks.

• Cryptography derived its name from a Greek word called “Kryptos” which means “Hidden Secrets”.

• Cryptography is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it.

• The term is most often associated with scrambling plaintext (ordinary text) into cipher text (a process called encryption), then back again (known as decryption).

What is cryptography?

Bob Alice

Types of Cryptography

(Secret key) (Public key)

Asymmetric key cryptography: (Public key)• Two different keys are used for

encryption and decryption.• More secured, relatively complex

Symmetric key cryptography (private key)

• Only one key is used for encryption and decryption• It is simple and faster• Less secured

Purpose of cryptography• Defending against

external/internal hackers• Securing E-commerce• Securing bank

accounts/electronic transfer• Securing intellectual property• Avoiding liability

Thank you!!