Cryptography and
Network Security
Chapter 20
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 20 Firewalls
The function of a strong position is to make
the forces holding it practically
unassailable
On War, Carl Von Clausewitz
In
Cryptography and
Network Security
Chapter 4
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 4 Finite Fields
The next morning at daybreak, Star flew indoors,
seemingly keen for a lesson. I said, "Tap eight." She did
a brilliant e
Cryptography and
Network Security
Chapter 3
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 3 Block Ciphers and
the Data Encryption Standard
All the afternoon Mungo had been working on
Stern's code, principally with the aid of t
Cryptography and
Network Security
Chapter 7
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 7 Confidentiality Using
Symmetric Encryption
John wrote the letters of the alphabet under the letters in
its first lines and tried it ag
Cryptography and
Network Security
Chapter 8
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 8 Introduction to
Number Theory
The Devil said to Daniel Webster: "Set me a task I can't carry out, and
I'll give you anything in the wo
Classical Encryption
Techniques
Symmetric Encryption
or conventional /
private-key / single-key
sender and recipient share a common key
all classical encryption algorithms are
private-key
was only type prior to invention of publickey in 1970s
and by
Advanced Encryption
Standard
Origins
clear a replacement for DES was needed
have theoretical attacks that can break it
have demonstrated exhaustive key search attacks
can use Triple-DES but slow, has small blocks
US NIST issued call for ciphers in 1997
15
Cryptography and
Network Security
Chapter 1
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 1 Introduction
The art of war teaches us to rely not on the
likelihood of the enemy's not coming, but
on our own readiness to receive hi
Algorithmic Number Theory
MSRI Publications
Volume 44, 2008
Lattices
HENDRIK W. LENSTRA, JR.
A BSTRACT. It occurs frequently in algorithmic number theory that a problem
has both a discrete and a continuous component. A typical example is the
search for a
Cryptography and
Network Security
Chapter 13
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 13 Digital Signatures &
Authentication Protocols
To guard against the baneful influence exerted by strangers
is therefore an elementary
Cryptography and
Network Security
Chapter 6
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 6 Contemporary
Symmetric Ciphers
"I am fairly familiar with all the forms of
secret writings, and am myself the author
of a trifling mon
Cryptography and
Network Security
Chapter 19
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 19 Malicious Software
What is the concept of defense: The
parrying of a blow. What is its
characteristic feature: Awaiting the blow.
On
Cryptography and
Network Security
Chapter 15
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Email Security
email is one of the most widely used and
regarded network services
currently message contents are not secure
may be inspected
Cryptography and
Network Security
Chapter 17
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 17 Web Security
Use your mentality
Wake up to reality
From the song, "I've Got You under
My Skin by Cole Porter
Web Security
Web now w
Cryptography and
Network Security
Chapter 16
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 16 IP Security
If a secret piece of news is divulged by a
spy before the time is ripe, he must be put
to death, together with the man t
Cryptography and
Network Security
Chapter 18
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 18 Intruders
They agreed that Graham should set the test for
Charles Mabledene. It was neither more nor less
than that Dragon should ge
Cryptography and
Network Security
Chapter 14
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 14 Authentication
Applications
We cannot enter into alliance with
neighboring princes until we are
acquainted with their designs.
The A
Cryptography and
Network Security
Chapter 11
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 11 Message
Authentication and Hash
Functions
At cats' green on the Sunday he took the message from
the inside of the pillar and added P
Cryptography and
Network Security
Chapter 10
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 10 Key Management;
Other Public Key Cryptosystems
No Singhalese, whether man or woman, would
venture out of the house without a bunch o
Cryptography and
Network Security
Chapter 12
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Chapter 12 Hash and MAC
Algorithms
Each of the messages, like each one he had ever
read of Stern's commands, began with a number
and ended with
Cryptography and
Network Security
Chapter 9
Fourth Edition
by William Stallings
Lecture slides by Lawrie Brown
Private-Key Cryptography
traditional
private/secret/single key
cryptography uses one key
shared by both sender and receiver
if this key is di
Digital Collections @ Dordt
Faculty Work: Comprehensive List
1-2016
Discrete Mathematics: Chapter 4, Basic Set Theory
& Combinatorics
Calvin Jongsma
Dordt College, [email protected]
Follow this and additional works at: http:/digitalcollections.dord
Discrete Structures - CB0246
Lattices
Andrs Sicard-Ramrez
EAFIT University
Semester 2014-2
Lattices from the Partial Orders Theory
Definition (Lattice)
A lattice (retculo) is a poset where every pair of elements has both a
supremum and an infimum.
Discret
Data Encryption Standard
(DES)
By,
B. R. Chandavarkar,
CSE Dept.,
NITK Surathkal
A block cipher is an encryption/decryption scheme in which a
block of plaintext is treated as a whole and used to produce a
ciphertext block of equal length.
Many block cip
Reg. No.:
Marks:
Department of Computer Science and Engineering, NITK, Surathkal
Class Test-2 [IS703-Network Security]
Time: 40 mins.]
1. Show Elliptic Curve Cryptography Diffie-Hellman Key Exchange.
[Max. Marks: 10
[4 Marks]
2. Draw a neat diagram of any
Reg. No.:
Marks:
Department of Computer Science and Engineering, NITK, Surathkal
Class Test-1 [IS703-Network Security]
Time: 40 mins.]
[Max. Marks: 10
1. The following shows a plaintext and its corresponding ciphertext. Is the cipher
monoalphabetic?
(i)
[
Cryptographic Hash Function
A hash function H accepts a variable-length block of data as
input and produces a fixed-size hash value h = H(M).
The principal object of a hash function is data integrity.
A change to any bit or bits in M results, with high