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(a) Which PKI (Public Key Infrastructure) model is typically favored by business organization?
(b) Give one possible use of the "extensions" field of an X.509 certificate.
(c) Users in a PKI can obtain digital certificates of users they want to communicate with. Which protocol is typically used to interact with the directory server to obtain certificate(s)?
(d) Calculate the RSA public and private keys given the values of p and q as follows: p = 17; q = 11. Show details of workings.
Choose e = 7
(e) What is meant by Certificate Revocation? When would a certificate have to be revoked?
(f) Alice and Bob are communicating.
i. Explain how Alice and Bob can communicate such that all their communication can be authenticated and can be verified for integrity.
Confidentiality is not required.
ii. Modify your answer such that now it also provides replay attack detection.
Innovative nature of triple key management The triple key management scheme provides secure services by combining different techniques whic contribute to the security and priv
(a) Briefly explain the following security goals provided by cryptography: confidentiality, authentication, integrity and non-repudiation. (b) State Kerckhoff's Princip
Problem (a) As a forensic investigator, you are needed to trace the source of an email. It is suspected that the email header has been forged. Show how you would proceed to
Question An organization is planning to connect its networks to the Internet. The network is located within a four story building. A web server supporting online sales is also
Probelm 1: Give the History and Evolution of Wireless Communication System. Complete explanation Probelm 2: Describe the process of Components Identification and cal
FRAGMENT IDENTIFICATION: IDENT field in every fragment matches IDENT field in real datagram. Fragments from different datagrams may arrive out of order and still be saved out.
table for inverse z transform
Problem 1 . Show various features of a 1G network Total three features for each feature of 1G Problem 2. Describe how a cellular network works with functional block diagram
The following message was enciphered with a Vigenère cipher. aikiaawgfspxeppvjabjnivulfznzvkrlidamsmyamlvskniyffdpbwtnxsvvbtnamvltsefoeycztkomylmerkwrs deusjgecmzkwvnreeyp
ROUTING TABLES AND ADDRESS MASKS Additional information is saved in routing table. Destination is kept as network address. Next hop is saved as IP address of router. Address m
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