COSC2536 - Security in Computing and Information Technology - Privacy Preserving Online Voting System - IT Assignment Help

COSC2536:  Security in Computing and Information Technology  Privacy-Preserving Online Voting System IT Assignment Help

Assignment Task:

Q1. Privacy Preserving Online Voting System  
Recently, several controversies have been observed in the voting around the world. The voting authority cannot be trusted completely as it can be biased. Using a privacy-preserving online voting system removes controversy in the voting system. In this privacy-preserving online voting system, voters encrypt their votes in the voting booth before sending them to the voting authority. A voting server computes an encrypted result on behalf of the voting booth as the voting booth does not have enough computation power. The encrypted result is sent to the voting authority who determines the winner based on encrypted votes. 
Suppose there are 7 voters to vote for YES or NO to give their opinions. There is a voting authority (VA) who determines the winner. Design a secure voting prototype as shown in Figure-Q1 using Paillier cryptosystem where the votes must be encrypted from Voting Booth before sending them to the Voting Server.

Assume, three voters will vote for YES and four voters will vote for NO. The Voting Authority should find three YESs and four NOs after counting the votes. The Voting Authority chooses p=89, q=53, and select g=8537. The private numbers chosen by 7 voters and their votes are as follow.

Q2. Digital Signatures Suppose Bob and Alice, two business partners, use their smartphones to communicate with each other regarding their business decisions. Hence, their messages are very sensitive and require to be authenticated. Otherwise, an attacker, say one of their business rivals, may perform phone number porting fraud attack. In this attack, the attacker may use another SIM card to port Alice or Bob’s phone number for pretending as Alice or Bob, respectively. Therefore, Bob and Alice uses digital signature scheme in their smartphone to sign messages for ensuring authenticity. The working procedure of the digital signature is illustrated in FigureQ2.

Q2.1 [RSA Signature Scheme] Suppose Bob (the sender) wants to send a message m=123456 to Alice (the receiver). However, before sending the message he would like to sign the message. When Alice receives the signed message, she would like to verify that the message is indeed from Bob. To facilitate signing and verification Bob generates public and private keys using the RSA encryption algorithm and sends the public key to Alice. Bob uses parameter p = 5563 and q = 3821, and chooses a suitable public key parameter e=9623. How would Bob sign message m=123456? How would Alice verify the signed message from Bob? [Hints: Refer to the lecture-6 and tutorial-6. You do not need to generate a hash of the message m.]

Q2.2 [ElGamal Signature Scheme]  Suppose Bob (the sender) wants to send a message m=4567 to Alice (the receiver). However, before sending the message he would like to sign the message. When Alice receives the signed message, she would like to verify that the message is indeed from Bob. To facilitate signing and verification Bob generates public and private keys using the ElGamal encryption algorithm and sends the public key to Alice. Bob chooses p= 7331, g=3411, x=41. How would Bob sign message m=4567? How would Alice verify the signed message from Bob? [Hints: Refer to the lecture-6 and tutorial-6. You do not need to generate a hash of the message m.]

Q3. OpenSSL and IPFS Assume that an owner of a particular file, say Alice, wants to share the file to her colleague, say Bob. In other words, Alice is the sender and Bob is the receiver. They use an IPFS based file repository and OpenSSL for providing security. Alice and Bob perform several operations using OpenSSL and IPFS to ensure secure file sharing. Throughout the processes, AES symmetric-key and RSA public-key encryption algorithms of OpenSSL are used. You should choose your own file (e.g. a text file with your student number and name) and AES encryption key (e.g. 123456789). The scenario is illustrated in the Figure-Q3 below. You are expected to show the required OpenSSL and IPFS commands sequentially for each step stated below. Please provide a screenshot of the outcome for each command. The steps are stated as follows: I. Bob generates RSA public and private key pair for himself using OpenSSL. Bob sends his public key to Alice via email.

II. Alice selects a shared AES secret key (KAB = 123456789). Next, Alice encrypts the file with Alice and Bob’s shared AES secret key (KAB) using OpenSSL and generates a ciphertext file (say, the file name is “ciphertext.txt”). III. Alice uploads the encrypted file in the IPFS-based repository and receives a Unique Identifier (UI). IV. Alice encrypts KAB with Bob’s RSA public key using OpenSSL and gets a ciphertext file (say, the file name is “encrypte-key.txt”). V. Alice sends UI and “encrypted-key.txt” to Bob through email. VI. Upon receiving them, Bob decrypts “encrypt-key.txt” using OpenSSL with his RSA private-key and retrieves the shared AES secret key (KAB). VII. Bob uses Unique Identifier (UI) to download the file from IPFS-based repository with IPFS commands. VIII. Upon receiving the file from IPFS network, Bob decrypts the downloaded file from IPFS network using the shared AES secret key (KAB).

4. Report Writing or Implementation

Q4.1 [Writing Report on Blockchain] Choose a system where Blockchain Technology can be applied. Write a well-organized report on how the Blockchain Technology can impact your chosen system. You may consider the followings scenarios to prepare your report: • Blockchain based Financial System • Blockchain based Real Estate Management Systems • Blockchain based Healthcare • Blockchain based smart city • Blockchain based smart manufacturing • Blockchain based supply-chain • Blockchain based E-Commerce • Blockchain based IoT applications In this report, you expected to provide necessary background of the system you choose and the blockchain technology. Presenting an innovative scenario is highly appreciated. Most importantly, a detail system design should be presented.

Q4.2 [Implementing a Blockchain System] In this question, you are expected to implement a blockchain system a scenario stated in

Q4.1. You are allowed to use any programming language or scripting language such as Java, PHP, Python, JavaScript, etc. Your implementation must have a good graphical user interface (GUI). Upon completion of the implementation, you are expected to: I. Demonstrate your work to the lecturer or head tutor in Week-11 & 12 tutorials II. Create a short report containing the implementation details and user instructions III. Upload your code and report

Q4.3 [Implementing a Privacy-preserving Online Voting System] In this question, you are expected to implement an online voting system using the concept of Paillier encryption scheme based privacy-preserving computation (refer to the scenario stated in Q1 of this assignment). You are allowed to use any programming language or scripting language such as Java, PHP, Python, JavaScript, etc. Your implementation must have a good graphical user interface (GUI). Upon completion of the implementation, you are expected to:

This IT Assignment has been solved by our IT experts at My Uni Paper. Our Assignment Writing Experts are efficient to provide a fresh solution to this question. We are serving more than 10000+ Students in Australia, UK & US by helping them to score HD in their academics. Our experts are well trained to follow all marking rubrics & referencing style.

Be it a used or new solution, the quality of the work submitted by our assignment experts remains unhampered. You may continue to expect the same or even better quality with the used and new assignment solution files respectively. There’s one thing to be noticed that you could choose one between the two and acquire an HD either way. You could choose a new assignment solution file to get yourself an exclusive, plagiarism (with free Turnitin file), expert quality assignment or order an old solution file that was considered worthy of the highest distinction.