Computer Security and Legal Issues

Computer Security and Legal Issues

Question No. 1

Answer (a)

In symmetric encryption, it is important to exchange keys because symmetric encryption refers to as shared secret or shared key encryption. A single is used both to encrypt and decrypt traffic in symmetric encryption. Common symmetric encryption algorithms such as RC4, 3DES, DES and AES, are commonly used in IPsec and various other types of VPNs. As the base encryption, RC4 has seen wide deployment on wireless networks used by WPA version 1 and WEP. The symmetric encryption algorithm can be very fast and possess comparatively low complexity which helps in easy and simplified implementation in hardware. Therefore, all the hosts are required to participate in the encryption that has configured through some external source with the secret key (Cassat, 2003).

Answer (b)

In order to streamline the procedures for sharing and protecting valuable and sensitive information, Public Key Infrastructure (PKI) offers significant opportunities. Public Key has the ability to handle all the security requirements of a company. It is basically a significant technology for the internet and is mostly used for the applications for various functions as performed by VPNs and e-commerce.

Answer (c)

Digital Signature

A digital signature is the name given to a signature which is unique and mathematically computed and works for ensuring the accountability (Cassat, 2003).

Digital Certificate

A digital certificate is an electronic ID card which is issued by a reliable third party. It is used for a unique identification of an entity. The ISO authentication also refers to as X.509 protocol is formed by digital certificates also known as X.509 protocol. Across all the networks, authentication is offered by this network. There are two main purposes that are served by a digital certificate: owner's identity is established through it and the availability of owner's public key is made available through ...