Author, Consultant, Computer Expert
| Forensics | Speaking | Class Notes | Research
If you are aware of any errors in any books, please let me know: Hey Chuck,I found an error!
Modern Cryptography: Applied Mathematics for Encryption and Information Security
|Chapter 1||Page 7 discussing Affine Ciphers has
Attack at dawn
Frrfj0 fr bfxf
It should be
Frrfj0 fr lfxf
|Chapter 4||Fermat Prime is formatted wrong. It should be 2^ 2n (2 raised to the 2n power) + 1|
has Galois living from 1811 to 1932 which would have made him 121
years old. That should be 1811 to 1832
Chapter 4, page 83 The truth table is incorrect on row three. Row three should have an F as the result, not a T
|Chapter 5||question 4 should be A ring not C group|
Note on the Birthday Paradox. In the book I describe the birthday paradox and use DES as an example. This has generated some negative comments, and frankly one individual has become obsessive on Amazon.com and other sites on this issue. Allow me to state for the record:
1. The Birthday paradox in the form described in the text is applicable to hash collisions, not symmetric ciphers. I was giving a simplified example. As the book states several times, the math is simplified so those without a math background can understand. In this case it may have been over simplified. It is an unfortunate fact that sometimes when over simplifying something, one can go too far. And in this case that occurred. To be more direct: the description of the birthday paradox given in the book is accurate and detailed, however the application to DES is inaccurate. The birthday paradox is usually applied to hash collisions. Yes the birthday paradox can be applied to symmetric ciphers (as noted below) but not in the basic form presented in the book.
2. However, there are variations of the birthday paradox that are applicable to symmetric ciphers. One example is Using collisions (i.e. birthday paradox) in conjunction with other methods to attack AES.
C++ Programming Fundamentals
|chapter 2|| Image 2.7 is wrong. It should be
In Chapter 3, page 9, you talk about String Properties and Methods, and the C-style string function that are still used frequently. In Example 3.8,
That line should be
then of course
cout << "Both strings you entered are " << firststring<< "\n";
What happens with strcat is the second string is appended to the first. There is no need for a third string.
Learn VB.Net 1st Edition
|Chapter 1 and 2||
The database example (5.1) works fine up to the point where you fill in
the code for the buttons. The appropriate code for the form load, and all
click events is shown here:
Public Class Form1
Dim dbindingmanager As BindingManagerBase
#Region " Windows Form Designer generated code "
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' This code is needed to fill in the data set
' with data from the underlying database.
' set the binding manager
dbindingmanager = Me.BindingContext(DataSet11, "students")
Private Sub btnnext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnnext.Click
dbindingmanager.Position += 1
Private Sub btnprevious_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnprevious.Click
dbindingmanager.Position -= 1
Private Sub btnadd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnadd.Click
Private Sub btndelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndelete.Click
Private Sub btnupdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnupdate.Click
' you must stop editing before updating
'Update from the dataset
'clear and refill dataset