Consider an online store for consumer products. Whenever a customer chooses a product to order, therelevant product ID, the quantity ordered, and the item price is added to the shopping basket. Anexample of the shopping basket is shown below.ItemProduct IDQuantityItem price1DVD1012£2.52ВОOK2054£1At the checkout, this particular order should cost (2 x £2.5) + (4x £1) = £9. However, what if an attackersets the quantity value for BOOK205 to -4 (minus 4) when the data from the shopping basket is sent tothe web server? Then the attacker has to pay only (2 x £2.5) + (-4 x £1) = £1. The system may notdispatch BOOK205 because of its negative quantity value but still the attacker could get 2 of DVD101 for£1! This type of security attack is called a parameter tampering attack. To prevent this attack, thecheckout program has to make sure that the quantity of every item in the shopping basket is a naturalnumber, i.e. greater than zero.Let product(X) stand for X is a product in the shopping basket at the checkout.Let product_quantity(X, Y) stand for Y is the quantity of the product X.Let natural(X) stand for X is a natural number greater than zero.Using the predicate symbols above, which of the following constraints can be used to prevent negativequantity values?Select one:O VX.VY. ((product(X) ^ product_quantity(X,Y)) → natural(Y))O VX.VY. (product(X) ^ product_quantity(X,Y) ^ natural(Y))O VX. VY. (product(X) → (product_quantity(X,Y) ^ natural(Y)))O VX.3Y. (product(X) ^ product_quantity(X,Y) ^ natural(X))

consider an online store Tor consumer products. henever a customer chooses a product to order, the relevant product ID, the quantity ordered, and the item price is added to the shopping basket. An example of the shopping basket is shown below. Item Product ID Quantity Item price 1 DVD101 2 £2.5 2 ВОOK205 4 £1 At the checkout, this particular order should cost (2 x £2.5) + (4x £1) = £9. However, what if an attacker sets the quantity value for BOOK205 to -4 (minus 4) when the data from the shopning basket is sent to

consider an online store Tor consumer products. henever a customer chooses a product to order, the relevant product ID, the quantity ordered, and the item price is added to the shopping basket. An example of the shopping basket is shown below. Item Product ID Quantity Item price 1 DVD101 2 £2.5 2 ВОOK205 4 £1 At the checkout, this particular order should cost (2 x £2.5) + (4x £1) = £9. However, what if an attacker sets the quantity value for BOOK205 to -4 (minus 4) when the data from the shopning basket is sent to

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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Jessie has a lot of cooking with her (N). He often remembered the first few letters of the recipe and forgot the others. Like all great chefs, Jessie re-calculated the recipes according to the priority. So, looking at the list of recipes and priorities answers Jessie's questions. Response from Jessie: Giving the first few letters of the recipe; you have to print the perfect recipe in the most important way. Note: Every recipe has a unique value. Please answer this in C++ Only Input 1 flour-with-eggs 100 1 G Output 0
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