Cryptography in networks
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Cryptography is the process of securing communication and information by converting plain text into cipher text using cryptographic algorithms and keys. There are two main types: symmetric key cryptography which uses a single private key for encryption and decryption and is faster but less secure, and asymmetric key cryptography which uses two different keys (public and private) and is more complex but more secure. The purpose of cryptography is to defend against hackers and securely transmit sensitive information such as financial transactions, intellectual property, and other private communications.
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cryptography.ppt - Copy.ppt
cryptography.ppt - Copy.pptSudhanshuKarna This document presents information on cryptography. It begins with an introduction to cryptography and its importance for secure internet communications. It then defines cryptography as the practice of hiding information and converting intelligible data into unintelligible data. The document outlines some of the main benefits of cryptography including confidentiality, authentication, data integrity, and non-repudiation. It also lists some drawbacks such as reduced availability and increased costs. It describes the main purposes of cryptography as authentication, privacy, integrity, and non-repudiation. It provides an overview of the architecture of cryptography and the main types: secret key cryptography and public key cryptography. It concludes that different algorithms are used to provide security services and that private and public key cryptography are used
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- 1. By Kajal Chaudhari Roll No.: 30 Cryptography in networks.
- 2. • 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?
- 3. Bob Alice
- 5. Types of Cryptography (Secret key) (Public key)
- 6. Asymmetric key cryptography: (Public key) • Two different keys are used for encryption and decryption. • More secured, relatively complex
- 7. Symmetric key cryptography (private key) • Only one key is used for encryption and decryption • It is simple and faster • Less secured
- 8. Purpose of cryptography • Defending against external/internal hackers • Securing E-commerce • Securing bank accounts/electronic transfer • Securing intellectual property • Avoiding liability
- 9. Thank you!!