Cryptography
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The document provides an overview of cryptography, detailing its history, definitions, and methods such as the Caesar cipher and permutation cipher. It discusses the significance of cryptography in secure communication, highlighting advancements from ancient techniques to modern applications in IT and cybersecurity. Additionally, it emphasizes the role of cryptography in strong authentication and wireless communication security.
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Cryptography
- 1. C r y p t o g r a p h y Presented by Saumil Patel Divyarajsinh Vaghela Richa Raval Milan Patel
- 3. C R Y P T O G R A P H Y An art of making and solving codes What is Cryptography?
- 4. C R Y P T O G R A P H Y What was the need to invent Cryptography? For Secure Communication
- 5. C R Y P T O G R A P H Y Hacker
- 6. C R Y P T O G R A P H Y Key Words Plain Text :- It is the simple text. Cipher Text :- It is the coded text. Encryption :- Converting plain text into Cipher text. Decryption :- Converting back from Cipher text into Plain text. (Ex. Hello) (Ex. lkjne)
- 7. C R Y P T O G R A P H Y Defination It is the practice and study of techniques for secure communication of data. This system is called Cryptosystem.
- 8. of
- 9. Ancient History Pioneer of Cryptography :- Julius Caesar Birth :- 100 BC Country :- Rome Invention :- Shift Cipher method
- 10. Ancient History Started in Egypt in 3000 B.C. They found it very complicate due to insufficient knowledge of Mathematics & Cryptography. Finally they had to stop it
- 11. Ancient History Weakness of Shift Cipher :- Any one can decrypt it easily Well known example of Mary Queen of Scot Queen Elizabeth I c c
- 12. Modern History (Zimmermanns Telegram) Sent by Arthur Zimmermann, the foreign secretary of Germany on 11/01/1917. United States entered into World War - I It was intercepted and decoded by British Intelligence.
- 13. In 20th Century Invented by Arthur Scherbius at the end of World War I. Intention:- To Encode and decode of Ciphers. Adopted by Military and Govt. First broken by Polish Cipher Bureau in Dec.1932 by using Theoretical Mathematics and Reverse Engineering. Enigma Machine
- 14. In 21th Century After the end of World War II, the Encryption and Decryption has shifted from .
- 15. In 21th Century Parallel to the development of advance methods in Cryptography were developed. Shift Cipher DES Cipher RSA Cipher Permutation Cipher DH Secret key exchange method
- 16. Ceasar Cipher/ Shift Cipher Method -Saumil Patel
- 17. Indian Army Pakistan Army ATTACK AT 5 P.M. DWWDFND WILYHSP DWWDFND WILYHSP ATTACK AT 5 P.M. ?
- 18. How did they do it??? They use a method called CEASAR CIPHER
- 19. CEASAR CIPHER One of the simplest and widely known encryption technique. Named after Julius Caesar. He used it in his private communication. This method is also known as Shift Cipher or Ceasers Code.
- 20. CEASAR CIPHER
- 21. CEASAR CIPHER How to convert a text into Cipher Code? Step -1 :- Remove space, comma(,) , dot(.), , etc. and write a simple sentence. Step -2 :- Replace numbers by alphabets. ex. 5 FIVE Step -3 :-Replace each alphabet by a definite shift.
- 22. CEASAR CIPHER Ex. ATTACK AT 5 P.M. Step -1 :- Remove space, comma(,) , dot(.), , etc. and write a simple sentence. ATTACKAT5PM
- 23. CEASAR CIPHER Ex. ATTACK AT 5 P.M. ATTACKAT5PM Step -2 :- Replace numbers by alphabets. ATTACKATFIVEPM
- 24. CEASAR CIPHER Ex. ATTACK AT 5 P.M. Step -3 :-Replace each alphabet by a definite shift. Plain Text :A T T A C K A T F I V E P M Cipher Text :D W W D F N D W I L Y H S P
- 25. CEASAR CIPHER Ex. ATTACK AT 5 P.M. Cipher Text: DWWDFNDWILYHSP
- 26. Cipher Disk & Permutation Method -Divyarajsinh Vaghela
- 27. Cipher Disk Enciphering & Deciphering tool. Developed by Italian Architect Leon Battista Alberti in 1470. It Consist of two concentric disk. 1) Large :- Stationary 2) Small :- Movable
- 29. Cipher Disk How Cipher Disk is Useful ? Disadvantage of Shift Cipher method is that there are only 25 different possibilities for each alphabet. Cipher Disk is useful to decrypt the Cipher code very quickly.
- 30. Permutation Cipher It is one of the most advance methods used now a days. What is the advantage to use Permutation Cipher? It is next to impossible to decrypt the code encrypted by Permutation Cipher.
- 31. Permutation Cipher * Method to create Permutation Cipher Code:- Step-1 :- Write all the alphabets in a row for the plain text. Step-2 :- Randomly choose any of the 26 alphabets for each alphabet of the plain text. Ex. For A choose N, For B choose W, etc
- 32. Permutation Cipher P E Z R N H I M A W F O B G V Y L D K C J Q S U T X Permuted Alphabet
- 33. Permutation Cipher Ex. ATTACK AT 5 P.M. A T T A C K A T F I V E P M P PCC Z F P CHAQ N Y B
- 34. Permutation Cipher ATTACK AT 5 P.M. PCCPZFPCHAQNYB PCCPZFPCHAQNYB
- 35. Applications & Importance of Cryptography - Milan Patel
- 36. Cryptography plays an important role in many IT applications ! HOW..??? Lets see an overview
- 37. Strong Authentication Cryptography plays an important role in Identity Management. There are many methods from to
- 38. Strong Authentication OTP tokens ( One Time Password Generating tokens) - Popular solution for securing authentication. - Widely used in Banks. - Manufactured by RSA, VASCO, Codes, etc.
- 39. HTTPS Strong Authentication Secure version of HTTP
- 40. HTTPS Strong Authentication Secure version of HTTP
- 41. HTTPS Strong Authentication Secure version of HTTP
- 42. HTTPS Strong Authentication Secure version of HTTP
- 43. HTTPS Strong Authentication Secure version of HTTP
- 44. HTTPS Strong Authentication Secure version of HTTP To access e-banking site. To secure online credit card transaction. For secure email messaging. File sharing.
- 45. TLS protocol Strong Authentication (Transport Layer Security) - Most widely used protocol. - Ex. Certificate for server authentication.
- 46. Wireless Communication Why use Cryptography for Wireless Communication ? Because -It is very easy for any one to hack any wireless communication than an wired communication. -All that required are only laptop and an antenna..!
- 47. Wireless Communication It is the most widely used standard for wireless networking today. Cryptography plays an important role in Wi-fi in two ways 1) Securing data transmission 2) End point authentication
- 48. Wireless Communication It is designed to enable wireless data exchange over short distance. Cryptography plays an important role in Bluetooth in two aspect :- 1) Confidentially 2) Authentication (called pairing)
- 49. Every person in this world is related to CRYPTOGRAPHY! Communication Technology Cyber Security CRYPTOGRAPHY