In public key cryptography the public key is calculated using private key on the forward operation of the oneway function. Obtaining of private key from the public key is a reverse operation. If the reverse operation can be done easily, that is if the private key is obtained from the public key and other public data, then the public key algorithm for the particular keyThe advent of public key cryptography introduced the possibility of digital signatures, and other related concepts such as electronic credentials. In the information age, cryptography has become one of the major methods for protection in all applications. application of public key cryptography ppt
A look at the encryption algorithm and its security benefits. Publickey cryptography, or asymmetric cryptography, is an encryption scheme that uses two mathematically related, but not identical, keys a public key and a private key.
Henric Johnson 5 Requirements for PublicKey Cryptography 4. Computationally infeasible to determine private key (KR b) knowing public key (KU b) 5. Computationally infeasible to recover message Computer and Network Security by Avi Kak Lecture12 12. 1: PUBLICKEY CRYPTOGRAPHY Publickey cryptography is also known as asymmetrickey cryp tography, to distinguish it from the symmetrickey cryptographyapplication of public key cryptography ppt The Application of Public Key Cryptography to Network Security. Ted Reinhardt [email protected] ca Course 94. 470. Learning Objectives. Understand how public key cryptography can be used to provide network security services such as: Confidentiality Nonrepudiation Authentication Slideshow
PowerPoint Templates Are you a PowerPoint presenter looking to impress your audience with professional layouts? Well, youve come to the right place! With over 30, 000 presentation design templates to choose from, CrystalGraphics offers more s and templates with stylish backgrounds and designer application of public key cryptography ppt use the secret key to encrypt the bulk of the communication. Speed Secret key encryptiondecryption algorithms are much faster than public key algorithms. Many times a combination is used: use public key cryptography to share a secret key. Netprog: Cryptgraphy 18. Authentication in a public key encryption: B can decrypt the message using A's public key. Because the message was encrypted using A's private key, only A could have prepared the message. Step 2: A prepares a message to B and encrypts it using A's private key before transmitting it. Step 1: Chapter 8 Public Key Cryptography Figure 8. 4: Public Key Cryptography: Secrecy and Authentication. 1. where the sender encrypts the message with the receivers public key. 2. Digital signature: where the sender signs a message with his private key. 3. Key exchange: several approaches later.