The document provides an introduction to cryptography including definitions of terms and topics covered. It discusses symmetric-key cryptography and algorithms like substitution ciphers, transposition ciphers, DES, AES and their modes of operation. It also covers asymmetric-key cryptography including RSA and Diffie-Hellman key exchange with examples of encrypting and decrypting messages.
This presentation explains basics of Coding Theory in easy and detailed manner with derivations, explanations and examples. It prepares the users for advance Error Control Codes.
How were the first error correcting codes constructed? A historical introduct...PadmaGadiyar
Hamming's original construction has been recast into symbolic form. This leads to an elementary historical route to the theory of error correcting codes. The talk is going to be historical and pedagogical in nature
This presentation explains basics of Coding Theory in easy and detailed manner with derivations, explanations and examples. It prepares the users for advance Error Control Codes.
How were the first error correcting codes constructed? A historical introduct...PadmaGadiyar
Hamming's original construction has been recast into symbolic form. This leads to an elementary historical route to the theory of error correcting codes. The talk is going to be historical and pedagogical in nature
Syed Ubaid Ali Jafri has described cryptography technique in this document.techniques involve Ceaser Cipher, Play Fair Cipher, Transpotation technique, Subsitution Technique, DES Technique
Numeral Systems: Positional and Non-Positional
Conversions between Positional Numeral Systems: Binary, Decimal and Hexadecimal
Representation of Numbers in Computer Memory
Exercises: Conversion between Different Numeral Systems
Introduction
Number Systems
Types of Number systems
Inter conversion of number systems
Binary addition ,subtraction, multiplication and
division
Complements of binary number(1’s and 2’s
complement)
Grey code, ASCII, Ex
3,BCD
Syed Ubaid Ali Jafri has described cryptography technique in this document.techniques involve Ceaser Cipher, Play Fair Cipher, Transpotation technique, Subsitution Technique, DES Technique
Numeral Systems: Positional and Non-Positional
Conversions between Positional Numeral Systems: Binary, Decimal and Hexadecimal
Representation of Numbers in Computer Memory
Exercises: Conversion between Different Numeral Systems
Introduction
Number Systems
Types of Number systems
Inter conversion of number systems
Binary addition ,subtraction, multiplication and
division
Complements of binary number(1’s and 2’s
complement)
Grey code, ASCII, Ex
3,BCD
Cryptography is the practice and study of techniques for conveying information security.
The goal of Cryptography is to allow the intended recipients of the message to receive the message securely.
The most famous algorithm used today is RSA algorithm
Novel encryption algorithm and software development ecc and rsaSoham Mondal
Awarded 2nd prize in the event Papier (scientific paper presentation) conducted by Jadavpur University Electrical Engineering Department, named Convolution, under the aegis of IET and IEEE Signal Processing Society in 2018
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2. 30-1 INTRODUCTION Let us introduce the issues involved in cryptography. First, we need to define some terms; then we give some taxonomies. Definitions Two Categories Topics discussed in this section:
9. Figure 30.6 Comparison between two categories of cryptography
10. 30-2 SYMMETRIC-KEY CRYPTOGRAPHY Symmetric-key cryptography started thousands of years ago when people needed to exchange secrets (for example, in a war). We still mainly use symmetric-key cryptography in our network security. Traditional Ciphers Simple Modern Ciphers Modern Round Ciphers Mode of Operation Topics discussed in this section:
13. The following shows a plaintext and its corresponding ciphertext. Is the cipher monoalphabetic? Example 30.1 Solution The cipher is probably monoalphabetic because both occurrences of L’s are encrypted as O’s.
14. The following shows a plaintext and its corresponding ciphertext. Is the cipher monoalphabetic? Example 30.2 Solution The cipher is not monoalphabetic because each occurrence of L is encrypted by a different character. The first L is encrypted as N; the second as Z.
15. The shift cipher is sometimes referred to as the Caesar cipher. Note
16. Use the shift cipher with key = 15 to encrypt the message “HELLO.” Solution We encrypt one character at a time. Each character is shifted 15 characters down. Letter H is encrypted to W. Letter E is encrypted to T. The first L is encrypted to A. The second L is also encrypted to A. And O is encrypted to D. The cipher text is WTAAD . Example 30.3
17. Use the shift cipher with key = 15 to decrypt the message “WTAAD.” Solution We decrypt one character at a time. Each character is shifted 15 characters up. Letter W is decrypted to H. Letter T is decrypted to E. The first A is decrypted to L. The second A is decrypted to L. And, finally, D is decrypted to O. The plaintext is HELLO . Example 30.4
20. Encrypt the message “HELLO MY DEAR,” using the key shown in Figure 30.8. Solution We first remove the spaces in the message. We then divide the text into blocks of four characters. We add a bogus character Z at the end of the third block. The result is HELL OMYD EARZ. We create a three-block ciphertext ELHLMDOYAZER . Example 30.5
21. Using Example 30.5, decrypt the message “ELHLMDOYAZER”. Solution The result is HELL OMYD EARZ. After removing the bogus character and combining the characters, we get the original message “ HELLO MY DEAR .” Example 30.6
39. 30-3 ASYMMETRIC-KEY CRYPTOGRAPHY An asymmetric-key (or public-key) cipher uses two keys: one private and one public. We discuss two algorithms: RSA and Diffie-Hellman. RSA Diffie-Hellman Topics discussed in this section:
41. In RSA, e and n are announced to the public; d and are kept secret. Note
42. Bob chooses 7 and 11 as p and q and calculates n = 7 · 11 = 77. The value of = (7 − 1) (11 − 1) or 60. Now he chooses two keys, e and d. If he chooses e to be 13, then d is 37. Now imagine Alice sends the plaintext 5 to Bob. She uses the public key 13 to encrypt 5. Example 30.7
43. Example 30.7 (continued) Bob receives the ciphertext 26 and uses the private key 37 to decipher the ciphertext: The plaintext 5 sent by Alice is received as plaintext 5 by Bob.
44. Jennifer creates a pair of keys for herself. She chooses p = 397 and q = 401. She calculates n = 159,197 and = 396 · 400 = 158,400. She then chooses e = 343 and d = 12,007. Show how Ted can send a message to Jennifer if he knows e and n. Example 30.8
45. Solution Suppose Ted wants to send the message “ NO ” to Jennifer. He changes each character to a number (from 00 to 25) with each character coded as two digits. He then concatenates the two coded characters and gets a four-digit number. The plaintext is 1314. Ted then uses e and n to encrypt the message. The ciphertext is 1314 343 = 33,677 mod 159,197. Jennifer receives the message 33,677 and uses the decryption key d to decipher it as 33,677 12,007 = 1314 mod 159,197. Jennifer then decodes 1314 as the message “NO”. Figure 30.25 shows the process. Example 30.8 (continuted)
47. Let us give a realistic example. We randomly chose an integer of 512 bits. The integer p is a 159-digit number. Example 30.9 The integer q is a 160-digit number.
48. We calculate n. It has 309 digits: Example 30.9 (continued) We calculate . It has 309 digits:
49. We choose e = 35,535. We then find d. Example 30.9 (continued) Alice wants to send the message “THIS IS A TEST” which can be changed to a numeric value by using the 00–26 encoding scheme (26 is the space character).
50. The ciphertext calculated by Alice is C = P e , which is. Example 30.9 (continued) Bob can recover the plaintext from the ciphertext by using P = C d , which is The recovered plaintext is THIS IS A TEST after decoding.
52. Let us give a trivial example to make the procedure clear. Our example uses small numbers, but note that in a real situation, the numbers are very large. Assume g = 7 and p = 23. The steps are as follows: 1. Alice chooses x = 3 and calculates R 1 = 7 3 mod 23 = 21. 2. Bob chooses y = 6 and calculates R 2 = 7 6 mod 23 = 4. 3. Alice sends the number 21 to Bob. 4. Bob sends the number 4 to Alice. 5. Alice calculates the symmetric key K = 4 3 mod 23 = 18. 6. Bob calculates the symmetric key K = 21 6 mod 23 = 18. The value of K is the same for both Alice and Bob; g xy mod p = 7 18 mod 23 = 18. Example 30.10