- We all know in Caesar cipher we replace each alphabet with other alphabet which is 3 positions down the order. Modified Caesar cipher is same as actual Caesar cipher with little modification.
- We are now saying that alphabet A will not necessarily replace by alphabet D. It can be replaced by any other valid alphabet i.e. by E,F,G and so on, there are 25 other alphabets with whom we can replace alphabet A. Once replacement scheme is decided then it would be constant and will be use to replace other alphabets in that message.
- There are only 25 other combinations because there are 26 alphabets in English and it doesn’t make sense to replace it with himself.
- Hence to break modified Caesar cipher our earlier algorithm would not work but it is still weak encryption method.
Explain modified version of Caesar Cipher
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Multiple Columnar – Transposition Technique
Web Master, , Network Security, atul kahate notes network security, download bscit notes of Mumbai University, Multiple Columnar Transposition Technique, network security notes, network security notes for tybscit semester 5, Simple columnar transposition technique, 0
Multiple columnar transposition technique (i.e simple columnar with multiple rounds) To improve basic Simple columnar transposition technique, we can...
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Poly alphabetic Cipher in Network Security
Chirag Deora, , Network Security, atul kahate notes network security, download bscit notes of Mumbai University, mumbai university tybscit practical free download, network security notes for tybscit semester 5, network security practicals, Poly alphabetic Cipher, tybscit network security notes, 0
The Poly-Alphabetic cipher is also an example of substitution cipher which uses multiple one-character keys. In the program we...
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Explain the concept of Key Range and Key Size
Kaushik Kini, , Network Security, atul kahate notes network security, concept of Key Range and Key Size, Explain the concept of Key Range and Key Size, network security notes, tybscit network security concept of Key Range and Key Size, 1
• The concept of key range and key-size are related to each other. Key Range is total number of...
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Confidentiality in Network Security
Kaushik Kini, , Network Security, atul kahate notes network security, confidentiality in network security, network security notes, tybscit network security confideniality, 0
The principle of confidentiality specifies that only the sender and intended recipient should be able to access the...
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What are the different types of criminal attacks?
Kaushik Kini, , Network Security, atul kahate notes network security, network security notes, tybscit network security types of criminal attacks, types of criminal attacks in network security, 0
Fraud:- Modern fraud attacks concentrate on manipulating some aspects of electronic currency, credit cards, electronic stock certificates, checks, letters...
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Explain Pharming. (DNS Spoofing)
Kaushik Kini, , Network Security, atul kahate notes network security, DNS Spoofing, explain DNS Spoofing, Explain Pharming, network security notes, tybscit network security, tybscit network security DNS spoofing, tybscit network security Pharming, 0
DNS spoofing also known as pharming attack. As we know, using the Domain Name System (DNS), people can identify...
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Implement RSA algorithm in Network Security – Tybscit Semester 5
Chirag Deora, , Network Security, atul kahate notes network security, bscit notes for mumbai university, download bscit notes of Mumbai University, Implement RSA algorithm, network security notes, tybscit semester 5 practicals, 0
Click Here to download the PDF
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Implement Diffie Helman Key Exchange Algorithm
Chirag Deora, , Network Security, 0
The following example implements Diffie Helman Exchange Algorithm. Click here to download the PDF File
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