Answered: In the case of password storage in a…

In the case of password storage in a file, why is hashing the passwords a much better idea than encrypting the password file a much worse idea?

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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Why is hashing better than encryption when a password must be stored in a file? The function of a password file, and how to use it, are both explained.
What should you do if you unintentionally delete a file and then decide that you want it back?
Question # 1: Use the Multiplicative Cipher method to encrypt the following plaintext:We will succeed in our ventureKey length K = 7 You must show all the steps of your workQuestion # 2: Use the additive cipher with key = 15 to decrypt the message “WTAAD”.You must show all the steps of your work Question # 3: Use the concept of a one-way hash function to encrypt the following name into a 9 x 9 -dimensional database table. Jonathan Leea) How many rows and columns are there on this tableb) Which indices is Jonathan on this tablec) Why are hash functions relevant in database encryption?d) What would you do to remedy the problem of index congestion on your database?You must show all the steps of your work Question # 4: Use the multiplicative method to decrypt the following ciphertext.MADWU Key = 5You must show all the steps of your workQuestion # 5: use the XOR technique to encrypt the following statement before transmission: The quick brown fox jumps over the lazy dog
Hashing is a process of converting input data of arbitrary size into a fixed-size output, typically a sequence of characters or digits that represents the original data. The output, known as a hash value or message digest, is generated using a mathematical function called a hash function. Hashing is commonly used in computer science and cryptography to ensure data integrity, security, and efficient data retrieval. It is a one-way function, meaning that it is easy to compute the hash value from the input data, but it is practically impossible to reconstruct the original data from the hash value. The topics of interest include hashing, hash tables, collision detection, temporal complexity, and hashing applications.
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Give examples of the advantages of pickling objects for file storage.
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What's the difference between the mental and physical representations of a file?
Part 2: Encryption Objective: Develop a program that encrypts a plaintext file by XORing 128-bit blocks of the file with a key repeatedly until the entire file is encrypted. Details: • The plaintext file will be a book from Project Gutenberg. • The encryption method should use the XOR operation on the file, 128 bits at a time, with the key. • Each 128-bit block is XORed with the same key. • The program should work from the command line and accept three parameters: o The name of the key file o The name of the plaintext file o The desired name of the resulting ciphertext file Note: This encryption method is not supposed to be secure. Usage: $ ./bad_streamcipher_enc kf pt ct
If you delete a file by accident and then later decide that you want it back, what steps should you follow to get it back?
Computer Security Project 3 AIM: Write the program that encrypts and decrypts a given message using the DES encryption algorithm. The message to be encrypted must be given by the user as program input. Each student is free to use the programming language that suits him. Required documents: The program code A print screen of program output after execution.