1451 Words6 Pages

Key Cryptography Basics
Problems with internet transactions
As discussed in class there are several problems with internet communication. The major three are:
Eavesdropping is the risk of having private information viewed as it travels from sender to recipient by a third party. The most popular fear is having your credit card number and information stolen while purchasing something online, but this would apply to any private information delivered over the internet.
Tampering is the risk of a third party intercepting a private transaction of information and changing it. An example of this would be altering the recipient fields on a purchase order.
Impersonation is the risk of someone impersonating a trusted recipient in order to receive private information. This
Encryption
Cryptograms in the newspaper are probably one of the most basic forms of encryption. A simple system of swapping letters for other letters is used to disguise the message making it indistinguishable to anyone who does not know the rules of the system. Even though the cryptogram system is so simplistic it is actually considered sporting to crack, the basic logic of encoding is the same for more sophisticated methods.
Key Based Encryption (symmetric encryption)
In this example of Key based encryption we first create a number conversion table so that we can apply mathematical rules to our message after converting it.
Number Conversion Table:
a
b
C
d
e
f
g
h
i
j
k
l
m
1
2
3
4
5
6
7
8
9
10
11
12
13
n
o
P
q
r
s
T
u
v
w
x
y
z
Space
14
15
16
17
18
19
20
21
22
23
24
25
26
0
Then we decide upon a key. In order to decipher this code the recipient will also be required to posses this key. It will become obvious by the end of our example that the shorter the key the easier the code will be to crack.
Key:
Encrypted
We then take the message and the key convert them using the conversion table and add them together. Then in order to reassign them to a letter value we take the mod base 27 in order to restrict the letter assignment to numbers within the 0 to 27 table.
Message:
on the internet nobody knows you are a dog

Related

## Annotated Bibliography On The Cryptography

1246 Words | 5 Pagesassessment items listed above will use only one topic. This will be allocated from the following: 1) Robotics 2) Human Computer Interface 3) Artificial Intelligence 4) Cryptography 5) Cybercrime CRYPTOGRAPHY: Secrets of writing codes. MIND MAP OF CRYPTOGRAPHY: My sub-topic is cryptography secrets symmetric, asymmetric key and digital signature as well. Websites Website Title: AN OVERVIEW OF CRYPTOGRAHY Author: Garry c.Kessler URL: http://www.garykessler.net/library/crypto.html Date

## Cryptography

1369 Words | 6 PagesCryptography Cryptography is the science of using mathematics to encrypt and decrypt data. Cryptography enables you to store sensitive information or transmit it across insecure networks so that it cannot be read by anyone except the intended recipient. While cryptography is the science of securing data, cryptanalysis is the science of analyzing and breaking secure communication. Classical cryptanalysis involves an interesting combination of analytical reasoning, application of mathematical tools

## All about Cryptography

1991 Words | 8 PagesCONTENTS 1 INTRODUCTION 2 2 THE RIJNDAEL ALGORITHM 2 3 HISTORY OF CRYPTOGRAPHY 4 4 MODERN TRENDS AND USES IN CRYPTOGRAPHY 5 4.1 Trends 5 4.1.1 Elliptic curve cryptography 5 4.1.2 Quantum Cryptography 6 4.2 Uses 6 5 TYPES OF CRYPTOGRAPHIC ALGORITHMS 6 5.1 Secret Key Cryptography 6 5.2 Public-Key Cryptography 7 5.3 Hash Functions 8 7 BIBLIOGRAPHY 9 1 INTRODUCTION A basic task in cryptography is to enable users to communicate securely over an insecure channel in a way that guarantees

## Cryptography

315 Words | 2 PagesCryptography is one way you can keep information secure. A person who does not know the method used to change the information to keep it secure cannot copy the method used or reverse the change. The basic components of cryptographic systems are used to encipher (scramble) information so that it is difficult to determine the meaning without the appropriate key or key(s) to decipher (unscramble) the information. The components include cryptographic algorithms (mathematical functions) for enciphering

## Cryptography and Basic Security Goals

907 Words | 4 Pagesquickly causes the creation of secure mechanisms. Cryptography technique is one of them. Cryptography is the basic encryption method used in implementing security. The word cryptography comes from the Greek word "Kryptos", that means hidden, and "Graphikos" which means writing. Cryptography or communication by using secret code was used by the Egyptians some 4000 years ago. However, the science of cryptography was initiated by Arabs since 600s. Cryptography becomes vital in the twentieth century where

## Quantum Cryptography

978 Words | 4 PagesQuantum Cryptography Keeping secrets and passing information that is undetected has long been the goal of cryptographers. Codes have been written and then broken keeping cryptographers in constant search for the unbreakable code. Until recently, that goal seemed unreachable; however, a solution to the once impossible question seems to have surfaced. Quantum cryptography delves down into the world of very small particles, where there are entirely new ways of building ciphers. ("Arrives" 2) Quantum

## Cryptography : The Past, Present And Future

1120 Words | 5 PagesCryptography: the Past, Present and Future The idea of cryptography has been in existence since 1900 BC with the use of inscriptions on the tomb of Khnumhotep II, in Egypt (Red Hat). Ever since that time, the uses and methods have changed, but the overall idea of transferring information in a secret and efficient manner has been the driving force for faster and safer data transfer. This paper will define cryptography, discuss its long history, current trends and the future of the complex electronic

## A Brief History of Cryptography

1864 Words | 8 PagesPeople wish to keep things like banking, medical, and political information from the eyes of unwelcome parties. This has created a need for cryptography. Cryptography is the science or study of the techniques of secret writing, especially code and cipher systems, and is used by everyone from the average citizen to the government and military. Cryptography was first used long before the invention of computers. One well-known system was attributed to the reign of Julius Caesar (Klein ix). Another

## Computerized Encoding And Decoding Of Information

1511 Words | 7 PagesIntroduction Cryptography or the enciphering and deciphering of messages in secret code including the computerized encoding and decoding of information (Merriam-Webster, 2016) has been prevalent throughout history. To understand the basics of cryptography several key ideas need to be defined. Encryption is term that is probably the most synonymous with cryptography. Encryption is changing information from one form to another (Merriam-Webster, 2016). It is through the use of encryption and its various

## How Encryption Is Important Than Most Important?

1620 Words | 7 PagesEncryption can be traced back to about the time when one human was trying to leave a message to another human. “About 1900 BC An Egyptian scribe used non-standard hieroglyphs in an inscription. Kahn lists this as the first documented example of written cryptography.” (Sans, 2001) This shows that as soon as man began to communicate, another has been attempting to intercept that message and use it for himself. This is shown again and again throughout history, most advancements in encryption have been direct

### Annotated Bibliography On The Cryptography

1246 Words | 5 Pages### Cryptography

1369 Words | 6 Pages### All about Cryptography

1991 Words | 8 Pages### Cryptography

315 Words | 2 Pages### Cryptography and Basic Security Goals

907 Words | 4 Pages### Quantum Cryptography

978 Words | 4 Pages### Cryptography : The Past, Present And Future

1120 Words | 5 Pages### A Brief History of Cryptography

1864 Words | 8 Pages### Computerized Encoding And Decoding Of Information

1511 Words | 7 Pages### How Encryption Is Important Than Most Important?

1620 Words | 7 Pages