In this project, you will employ cryptographic libraries to hash strings using the MD5 library. You will gain the experience necessary to use any of the modern hash functions in C#'s hashing library. With an MD5 hashing function, you will learn how to convert a string to bytes and salt that string for more secure hashing. You will also learn how to find collisions in a hash function using a birthday attack. Objectives Students will be able to: • Justify salting password hashes. • Employ the Birthday Paradox to find a collision in a hash function. Technology Requirements Programming assignments should be done using .NET Core 3.1. While you can write your code on a Windows or Mac machine, the autograder will test your code on Ubuntu 18.04. It is highly recommended to create a Virtual Machine for writing your assignments. Information on how to install the .NET Core SDK on Ubuntu can be found on Microsoft's website: Install .NET Core SDK or .NET Core Runtime on Debian You can create a new project using this command: dotnet new console --output project_name You can also run your project by going into your project directory and using: dotnet run

In this project, you will employ cryptographic libraries to hash strings using the MD5 library. You will gain the experience necessary to use any of the modern hash functions in C#'s hashing library. With an MD5 hashing function, you will learn how to convert a string to bytes and salt that string for more secure hashing. You will also learn how to find collisions in a hash function using a birthday attack. Objectives Students will be able to: • Justify salting password hashes. • Employ the Birthday Paradox to find a collision in a hash function. Technology Requirements Programming assignments should be done using .NET Core 3.1. While you can write your code on a Windows or Mac machine, the autograder will test your code on Ubuntu 18.04. It is highly recommended to create a Virtual Machine for writing your assignments. Information on how to install the .NET Core SDK on Ubuntu can be found on Microsoft's website: Install .NET Core SDK or .NET Core Runtime on Debian You can create a new project using this command: dotnet new console --output project_name You can also run your project by going into your project directory and using: dotnet run

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The hash code for Strings can be calculated once, at the time the String is created, which could potentially reduce its complexity.The precomputed value would be returned by subsequent calls to hashCode. This has the potential to be promising because a String's value never changes. How would you rate the effectiveness of such a procedure?
Hashing is a technique that is used to uniquely identify a specific object from a group of similar objects. Can you use one or two real-world example(s) to explain what a "hash" really is? How can a programmer implement it? Pls, give a thorough ans.
One way to potentially reduce the complexity of computing the hash code for Strings is to compute it only once—when the String is created.Future hashCode calls would return the precomputed value. Because the value of a String never changes, this has the potential to be useful. How would you rate the efficacy of such a method?
Description: In this project, you are required to make a java code to build a blockchain including multiple blocks. In each block, it contains a list of transactions, previous hash - the digital signature of the previous block, and the hash of the current block which is based on the list of transactions and the previous hash. If anyone would change anything with the previous block, the digital signature of the current block will change. When this changes, the digital signature of the next block will change. Detailed Requirements: 1. Define your block class which contains three private members and four public methods. a. Members: previousHash (int), transactions (String[]), and blockHash (int); b. Methods: i. Block( int previousHash, String[] transactions){} ii. getPreviousHash(){} iii. getTransaction(){} iv. getBlockHash(){} 2. Using ArrayList to design your Blockchain. 3. Your blockchain must contain genesis block and make it to be the first block. 4. You can add a block to the end of…
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Our hashmap was poorly constructed, thus all of the information is stored in a single container (a LinkedList). This defeats the purpose of using a hash map in the first place.
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