Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Expert Solution & Answer
Chapter 9, Problem 9PE
Explanation of Solution
Reasons:
- In general, there is no possibility to index encrypted values, except all occurrences of the value encrypt to the same value.
- However, mapping of all occurrences of the value to the same encrypted value is typically risky as the statistical analysis can be utilized for revealing common values even without the decryption process.
- Many techniques based on inserting random salt bits can be utilized to prevent statistical analysis; however, they can make the indexing process impractical...
Explanation of Solution
Explanation:
- When tuples are inserted in the
database , the primary key constraint must be checked by the database.- If the primary key value is encrypted, the databas...
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Write a C program that counts the number of ones (set bits) in the binary representation of a given number.
Example:Input: 13 (binary 1101)Output: 3 units
I need help to resolve or draw the diagrams. thank you
You were requested to design IP addresses for the following network using the addressblock 166.118.10.0/8, connected to Internet with interface 168.118.40.17 served by the serviceprovider with router 168.118.40.1/20.a) Specify an address and net mask for each network and router interface in the table provided.
b) Give the routing table at Router 1.c) How will Router 1 route the packets with destinationi) 168.118.10.5ii) 168.118.10.103iii) 168.119.10.31iii) 168.118.10.153
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- I would like to get help to draw an object relationship diagram for a typical library system.arrow_forwardGiven the network of bridges in figure, and assuming that LAN ports on A, B, C, D, E, J are 10 Mbs (cost 100 for ports) except for ports on F, G, I, H, K which are 100Mbps LANs (cost 19 for ports) Draw the obtained spanning tree, cross the blocking state ports, and circle the designated ports and write the best cost broadcasted by each router next to its root port. list in logic level detail the expected last STP messages that will define the final status at each router.arrow_forwardNext, you are going to combine everything you've learned about HTML and CSS to make a static site portfolio piece. The page should first introduce yourself. The content is up to you, but should include a variety of HTML elements, not just text. This should be followed by an online (HTML-ified) version of your CV (Resume). The following is a minimum list of requirements you should have across all your content: Both pages should start with a CSS reset (imported into your CSS, not included in your HTML) Semantic use of HTML5 sectioning elements for page structure A variety other semantic HTML elements Meaningful use of Grid, Flexbox and the Box Model as appropriate for different layout components A table An image Good use of CSS Custom Properties (variables) Non-trivial use of CSS animation Use of pseudeo elements An accessible colour palette Use of media queries The focus of this course is development, not design. However, being able to replicate a provided design for the web is…arrow_forward
- I would like to get help to draw an object relationship diagram for a typical library system.arrow_forwardhttps://docs.google.com/document/d/1lk0DgaWfVezagyjAEskyPoe9Ciw3J2XUH_HQfnWSmwU/edit?usp=sharing using the link for the case study answer the below questionarrow_forwardFinally, your going to write several small javascript functions to practice with javascript core programming (basically just using javascript as a normal scripting language). For each section you can hardcode input values, and all output should go to console (we'll worry about the actual web page on Assignment 4). You can complete these all in one HTML file, or create one file for each part.arrow_forward
- Write a C program to calculate the checksum for a given line of an IntelHex file. To get full points, you must be able to explain to the instructor the individual parts of the IntelHex line (see below), as well as any part of your code. Definition:The checksum is calculated as the two's complement of the sum of the individual bytes from the beginning of the line to the checksum. Example:If you enter this string: :10010000214601360121470136007EFE09D21901XX You should get a checksum of 40 instead of XX. Demonstrate the completion of the task by calculating checksums, for example, for the following strings: :100010000C9445000C9445000C9445000C944500xx:100020000C9445000C9445000C9445000C944500xx:100030000C9445000C9445000C9445000C944500xx:100040000C9445000C9445000C9445000C944500xxarrow_forwardWrite a program to calculate the function sin(x) or cos(x) using a Taylor series expansion around the point 0. In other words, you will program the sine or cosine function yourself, without using any existing solution. You can enter the angles in degrees or radians. The program must work for any input, e.g. -4500° or +8649°. The function will have two arguments: float sinus(float radians, float epsilon); For your own implementation, use one of the following relations (you only need to program either sine or cosine, you don't need both): Tip 1: Of course, you cannot calculate the sum of an infinite series indefinitely. You can see (if not, look in the program) that the terms keep getting smaller, so there will definitely be a situation where adding another term will not change the result in any way (see problem 1.3 – machine epsilon). However, you can end the calculation even earlier – when the result changes by less than epsilon (a pre-specified, sufficiently small number, e.g.…arrow_forwardWrite a C program that finds and prints the machine epsilon for the float and double data types. Also print the values of __FLT_EPSILON__ and __DBL_EPSILON__ defined in float.h. Reminder – the phrase data type tells how the compiler “understands” the ones and zeros you are working with. This identifies whether you are working with integers, letters, real numbers, and so on. Another definition:Machine epsilon is the "distance" between the number 1 and its immediate right neighbor. We work in binary (decimal is in parentheses): 1 + 0,1 = 1,1 (1 + 1/2 = 1,5) 1 + 0,01 = 1,01 (1 + 1/4 = 1,25) 1 + 0,001 = 1,001 (1 + 1/8 = 1,125) then, due to the limited accuracy of the computer at a certain number of decimal places, a situation arises where 1 + 0.0…001 = 1 (instead of the correct 1.0…001). Then the previous number 0.0…01 is called the machine epsilon . It is obvious that its value may be different on different computers. However, the machine…arrow_forward
- Write a program that performs a rotational bit shift to the right for a positive integer. The user enters a number, the number of bits to shift (and, if you want, the direction of the shift, but right is enough). Example:The number 9 (in binary form 1001) when rotated to the right by 1 bit becomes 1100. Tip : A bit rotation (also known as a cyclic shift) is an operation in which the bits in a binary number are shifted a certain number of places to the right or left, with bits that “fall out” at one end being returned to the opposite end. So, start with a bit shift operation. Write a few examples on paper before programming.Tip : Use the unsigned int data type.You can get the number of bits of this data type as follows: int bit_count = sizeof (unsigned int ) * 8arrow_forwardI need help resolving the following case problemarrow_forwardClick Here for the Solution 27. Write a Program for Insertion Sort in Java. Time Complexity: O(N 2) Space Complexity: 0(1) Click Here for the Solutionarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON 
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education