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Consider the following conceptual schema of an operational database owned by multinational real estate company. The database contains information about the real estate properties offered for sale, owners of properties, potential buyers who are interested in the properties and real estate agents involved in selling of the properties. Whenever a pro
Scope The objectives of Assignment 2 include conceptual modelling of a data warehouse, implementation of 0NF tables in HQL, implementation of external tables in HQL, and querying a data cube. Task 1 Consider the following conceptual schema of an operational database owned by a multinational real estate company. The database contains information abo
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5. In a mobile roaming system, there are three entities: a mobile user U, its home server H, and a foreign server V. The mobile user U, who is subscribed to the home server H, is currently in a foreign network administered by the foreign server V. There is a direct link between U and V, and another direct link between V and H. However, there is no
4. Alice and Bob are employees residing in two dispersed branches, D1 and D2, of the same company. They want to secure all the communications between them as follows: They want to ensure the authenticity of their IP packets when those packets are routed in the company intranet (i.e., Alice can verify that a packet is indeed from Bob, and vice ve
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1. Consider the following key exchange protocol which is a variant of the Diffie-Hellman protocol. Each user P has a secret key sk_P=x_P and public key pk= gx_P mod p.1: A B: gr_A mod p2: B A: gr_B mod p In the protocol, r_A and r_B are randomly chosen in each session by A and B. The shared key for communication is defined as K = gr_Ax_
Task 1 Background A departmental store issues in-store-credit-card to facilitate and encourage customers to make more purchases in the store. The in-store-credit-card is available to public members who wish to apply. Card holder is given a credit limit (based on card holder’s income) for making purchases in the store. At the end of the month, c
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Subject: Current Issues in Management Coursework Assignment Prepare a report where: 1:You critically evaluate the advantages and disadvantages of digital marketing. Illustrate your answer with HK business examples. (15 marks) 2.For one of the following Hong Kong businesses: ➢Outline how the digital marketing disadvantages can be overcome. (1
Mr EZY, Head of the Department of Education in Temasek Learning Hub (TLH) , has hired you to serve as the role of Systems Engineer to upgrade the company’s infrastructure. Most of the staff computers are still running on Windows 7 which has come to an end on January 14, 2020. Due to the recent Coronavirus (COVID-19), the government is encoura
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Task 1. Cryptanalysis Let 𝐸𝑛𝑐 be an encryption algorithm based on a one-way function 𝐹 , and 𝑟 a shared secret key between the sender and the receiver. 𝐸𝑛𝑐 works as follows: 1. Compute 𝐾 = 𝐹(𝑟)||𝐹(2𝑟)||𝐹(3𝑟)||𝐹(4𝑟)||.. ; 2. For a message 𝑀, the ciphertext is computed as 𝑀⨁𝐾 (i.e., one
Aims: 1. To gain a basic familiarity with some security concepts, and with classical ciphers, including statistical methods for cryptanalysis of them. 2. To become familiar with block ciphers, mode of operations, the importance of S-box and cryptanalysis of linear cipher. In this assignment, you will implement two “mini” versions of DES call
