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consider the relation schemas as followsworks person name company name salary lives person name street city located incompany name city managers
a software contract and consultancy firm maintains details of all the various projects in which its employees are currently involved these details
a visual basic is governed by an event processor explain the meaning of this phraseb differentiate between an event procedure and a general
a what is a viewb what is the implication of creating a view with the select statement in the view definitionc make reference to the relational
question this question refers to the database schema express the following queries in sqla list the first name last name and telephone number of all
assuming that all the tables have been created as given in the relational schema write sql code to make the following changes in the structure of the
a draw an entity-relationship model for the relational schema given in the appendix show all the entities relationships relationship names and
problem a describe rsa algorithm with an exampleb answer the following rsa encryption given the values of the primes are p 17 q 11 and choosing e
a describe the concept of zero knowledge proofs give a practical exampleb explain how a one way hash function worksc what are message authentication
a what are the different architectures for wireless networksb explain how wep authentication and encryption works describe the vulnerabilityc in what
problem a differentiate between private key and public key encryptionb what issue with private key encryption is resolved with public key encryptionc
problem 1solve the following caesar cipher by showing your working em kium em aie em kwvycmzmlproblem 2compare and contrast between block and stream
question 1a explain briefly the following terms as used in network securityi denial of service dos attackii birthday attackiii demilitarized
a an opponent is using rsa with the public key e53 n77 you intercept the ciphertext c10 all values on this problem including the ciphertext and the
a explain the importance of the euler totient function in cryptography calculate euler totient function value phi1280b explain the role of the
problem a using vigenegravere cipher and given the key abc find the ciphertext for the messagesimplicityonly the 26 lower-case alphabetical
a briefly explain the following security goals provided by cryptography confidentiality authentication integrity and non-repudiationb state
a using fermats theorem find 3201 mod 11b explain how the diffie-hellman key agreement protocol works and what its purpose and main properties
ai bob has public rsa key n 77 e 7show that bobs private key is d 43ii alice wants to send the message m 13 to bob she encrypts the message
a i if m pmiddotqmiddotr where p q and r are prime numbers what is phimii therefore determine phi440b describe the following terms as used in
use the chinese remainder theorem to evaluate x from the following simultaneous congruencesx equiv 1 mod 2 x equiv 2 mod 3 x equiv 3 mod 5calculate
a using the extended euclidean algorithm find the multiplicative inverse of 504 mod 67b decrypt the following ciphertext which has been encrypted
a consider the subsequent authentication optionsa using passwordb using pin and fingerprintwhich option a or b provides stronger security and whyb
a which pki public key infrastructure model is typically favored by business organizationb give one possible use of the extensions field of an
a explain the two possible configuration for 3desb what is the main disadvantage of 3desc why are most modern symmetric algorithm block ciphersd