Why cryptography is needed in networking? What is the key idea used in public key encryption system?

Subject Computer Network
NU Year Set: 6.(c) Marks: 2+2=4 Year: 2017

Cryptography in digital world offers three core area that protects you and your data from attempt theft, theft or an unauthorised use of your data and possible fraud. Cryptography cover this essential area; authentication, integrity, and confidentiality


Authentication; Authentication is a process in Cryptography that offers certificates as a solution, which are called “digital IDs,” coz they can be used to verify the identity of someone you don’t know. Hence it is upto you to decide whether someone is authentic or not.

cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key. Throughout the course participants will be exposed to many exciting open problems in the field and work on fun (optional) programming projects. In a second course (Crypto II) we will cover more advanced cryptographic tasks such as zero-knowledge, privacy mechanisms, and other forms of encryption.

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