question 43/44 A program developed for a Web store represents customer account balances using a format that approximates real numbers. While testing the program, a software developer discovers that some valuesappear to be mathematically imprecise. Which of the following is the most likely cause of the imprecision?AThe account balances are represented using a fixed number of bits, resulting in overflow errors.BThe account balances are represented using a fixed number of bits, resulting in round-off errors.The account balances are represented using an unlimited number of bits, resulting in overflow errors.DThe account balances are represented using an unlimited numberbits, resulting in round-off errors. Which of the following best exemplifies the use of keylogging to gain unauthorized access to a computer system?A user unintentionally installs a program on their computer that records all user input and forwards it to another computer. A few weeks later, someone else is able to access the user'sAcomputer using the recorded data.BA user has a very common password for an online banking account. Someone else guesses the password after a few attempts and gains access to the user's account.A user logs into an unsecure Web site. Someone else is able to view unencrypted log-in information as it is transmitted over the Internet. The user has the same username and password formultiple accounts, so the user's log-in information for multiple systems may be compromised.A user receives an e-mail that claims to be from the user's bank. The e-mail instructs the user to click on a link to a Web site and enter a username and password to verify an account. ShortlyDafter following the steps, the user discovers that the Web site is fraudulent and that the user's username and password were stolen.

43) The developer might have used a fixed number of bits to represent the number, so when the…

A program developed for a Web store represents customer acc appear to be mathematically imprecise. Which of the following A The account balances are represented using a fixed B The account balances are represented using a fixed The account balances are represented using an unli The account balances are represented using an unlim

A program developed for a Web store represents customer acc appear to be mathematically imprecise. Which of the following A The account balances are represented using a fixed B The account balances are represented using a fixed The account balances are represented using an unli The account balances are represented using an unlim

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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Using Java Programming Language, create a program that uses an encryption technique of your choice. The program should be able to encrypt each message and password it is fed to as input.
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It is often claimed that passwords do not get saved as plaintext anywhere in systems, and even the system administrator does not know your password. Given what you learned about hash functions. Explain how such a claim is possible. In other words, how do systems perform authentication without having to store passwords in a format that can be read by the system administrators. Authentication is primarly the process of verifying that provided password is correct. Design a simple authentication system and implement the following two methods: def signup (username, password): '''store the user credential so that the system knows how to authenticate the user in the future (when login () gets called).' def login (username, password): "''returns True, if the provided username and password are correct'''
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It is often claimed that passwords do not get saved as plaintext anywhere in systems, and even the system administrator does not know your password. Given what you learned about hash functions. Explain how such a claim is possible. In other words, how do systems perform authentication without having to store passwords in a format that can be read by the system administrators. Authentication is primarily the process of verifying that provided password is correct. Design a simple authentication system and implement the following two methods: def signup(username, password '''store the user credential so that the system knows how to authenticate the user in the future (when login() gets called).'''def login(username, password): '''returns True, if the provided username and password are correct'''
Consider the following scenario: you receive an email from your company's mail server alerting you that your password has been changed and that you must take action to confirm this. However, as far as you are aware, you have not changed the password. What gives? Why was the password changed, and what could have caused it to be changed? How did an attacker obtain the information they required to successfully reset the password? Was it a virus, and on what systems did it infect?
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