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CioheWednesday, April 13, 2016 University of Botswana ISS 334 LAB 2 ASSIGNMENT Ndlovu.I 200902852 Ndlovu.I ISS 334 Lab 2 Assignment Page 1 of 27 Wednesday, April 13, 2016 Contents 1. Hill Cipher Description .......................................................................................................................... 3 2. Question .............................................................................................................................

It takes plaintext and the key as input and follows some mechanism with the use of mathematical calculations to convert the plaintext into the cipher text. Instead of using the key that is in the numerical and text format if we use the set of the pixels of an image, then the algorithm will be able to generate the cipher

Impact of Cryptanalysis using Advanced 3D Playfair Cipher Gaurav Kumawat1, Sandeep Upadhyay2 1 Department of Computer Sc. & Engg, Techno India NJR Institute of Technology 1gaurav_kumawat2002@yahoo.com 2 Department of Computer Sc. & Engg, Techno India NJR Institute of Technology 2sandeepupadhyay30@gmail.com Abstract. The Playfair cipher is a manual symmetric encryption technique and was the first literal digraph substitution cipher. The cryptanalysis of the Playfair cipher is also aided by the

CODE IN JAVA Code for FINDING KEY LENGTH, KEY AND PLAIN TEXT TEXT DECRYPTION public static void main(String[] args) { String encrytedString = "OVVMEHINLHQGEANGPIRTICMYXUMSAMIABNQWEFOUZEEALHKTL" + "RBOYELRPGPCSZMHMCOJQZTTLRLAFCLRAYUTLNLKZTMEMRKDMFIVBEEEMJEOXUMQUN" + "KNVJFHIRFKOUXVWTQRVNVCULHYGABARQLUINPBWQUNKSWXUTAUQRQTLRZKETSSBNQ" + "PEEBEIERGJGOKXBBNQGEZMEAUGNVZFHMASNAWKYIJUAQGWYQECBCGSAMAGUGDINZU" + "XDXUQTSSEVLZTEHHKNQSWNAYTEXHKQQDLRZGDMESNKOTMBVGFEPLQTFOEYQIQSEAL" +

INDEX PAGE NO. 1. ABSTRACT 1 2. INTRODUCTION 1 3. CRYPTOGRAPHY 1 4. ENCRYPTION AND DECRYPTION 2 5. CIPHER 2 6. HISTORICAL CRYPTOGRAPHY 3 7. WARDRIVEN CRYPTOGRAPHY (World War I) 7 8. WARDRIVEN CRYPTOGRAPHY (World War II) 9 9. MORDERN ENCRYPTION 11 10. SYMMENTRIC KEY ENCRYPTION AND ITS IMPLEMENTATION 12 11. ASYMMENTRIC KEY ENCRYPTION 14 12. RSA ENCRYPTION 15 13. STEGANODRAPHY 17 14. FUTURE

Attacks on GSM Standards: Attacks against mobile communication are not only depends on the network weaknesses but the reasons may be mobile phones malware, identity theft by SIM cloning and so on. Some other attacks, such as phishing with SMS, may exploit human factors as well. But most of these attacks are done on the A5 family of ciphering algorithms. The exact formulation of these algorithm is still unknown but many researchers try to calculate it through reverse engineering and cryptanalysis

Electrical and Computer Engineering University of Windsor Windsor, Ontario 2 DATA SECURITY AND CRYPTOGRAPHY OBJECTIVE OF PROJECT: For a given piece of cipher text generated with a vigenere cipher, find its encryption key and recover the corresponding plaintext. ASSIGNED CIPHER TEXT: FCQUKTSCOWRCQUZKEPLKIBGUGUHELWIUUOSDYCUVAOTHUAUUACFBGKCALDLWZANVQ WYFPHUMCCSDSQYRUHCYMXIERDDIDHPXSCUMANJLFAZVOSPIQYYQSUPBFBKZDMMUHUQ QQBZPZKAWFQGZHMLGKOFIPLOZIVOSDVNHBWFAWCULQAVMXYHZWYFVJQLVVHTYOHBFY NWWQWGOSIUUVIFQCYRXSEHZYVWAWZIVPQQXJPGTUPKGIBKJVRLQTZAHIMCDWGVTTUD

Decryption Test Case Number #03 Test Case Type Decryption test Test Case Name Decryption without password Input Null Values Expected Output Displays a error message “BadPaddingException” • If user provides a desired file in the desired location without a password then it gives the above message. Decryption Test Case Number #04 Test Case Type Decryption test Test Case Name Decryption with password Input Null Values Expected Output Displays a error message “File Decrypted” • If user provides a desired

4 THE DIFFIE-HELLMAN KEY EXCHANGE ALGORITHM Whitfield Diffie and Martin Hellman proposed a famous key exchange protocol in 1976 [16]. Diffie-Hellman key exchange (D-H), is a method for exchanging cryptographic keys that allow two parties to share public key for encrypting their messages over an insecure communication channel [16]. We consider two Clients, X and Y [5,6]. 1. Both of the clients must agree to use large prime p and nonzero integer g which is a primitive root modulo p. 2. They share

INDEX 1. Objective 2. Introduction 3. Encryption a. Asymmetric Encryption b. Symmetric Encryption 4. Examples of encryption 5. Cryptography 6. Email Encryption a. Advantages of Encryption Email b. Disadvantages of Encryption Email c. Why use the Encryption Email 7. Use of Encryption 8. How it works 9. Protocols of the Email Encryption a. PGP b. S/MIME c. Message Encryption d. Mail session Encryption e. TLS 10. Conclusion 11. References Objective Email Encryption