This document provides an overview of cryptography and several encryption techniques throughout history. It begins with an introduction to terminology used in cryptography. Traditional cryptography techniques are then discussed, including transposition ciphers, Playfair ciphers, and the Vigenere cipher. The document also provides examples of how to implement each of these traditional ciphers. Finally, it discusses modern cryptography and provides a detailed explanation of how the RSA algorithm works, including how to generate public/private key pairs and how the encryption and decryption processes are performed.
An in depth look at classical cryptography and an introduction to hashing, symmetric cryptography, and asymmetric cryptography. Originally presented at TexSAW 2016.
A detailed description about Cryptography explaining the topic from the very basics. Explaining how it all started, and how is it currently being applied in the real world. Mostly useful for students in engineering and mathematics.
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
An in depth look at classical cryptography and an introduction to hashing, symmetric cryptography, and asymmetric cryptography. Originally presented at TexSAW 2016.
A detailed description about Cryptography explaining the topic from the very basics. Explaining how it all started, and how is it currently being applied in the real world. Mostly useful for students in engineering and mathematics.
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
Présentation de l'appication Nao Beer Buddybbourgois
Présentation à Nao sur Seine le 22 octobre 2013.
* Retour sur le concours Paddy buddy.
* Démo de l'application.
* Retour sur quelques points techniques
* Axes d'amélioration.
La dernière génération des bases de données ont les particularités suivante :
Être non relationnel, distribuée , open source et scalable.
Ce mouvement commence en 2009 et est entrain de grandir rapidement et avec beaucoup d'engouement.
La conférence a pour but de présenté les principales base noSql accessible en python. Elle sera agrémentée pour chaque base de donnée (environ 4, 10 min chacune) d'une présentation informative, d'une modélisation de schéma et d'un exemple d'application accédant au donnée (en python).
An introduction to computer vision in Python, from the general concept to its implementation with some current open-source libraries. Demonstrates a selection of basic computer vision examples using SciPy, OpenCV and Pygame.
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.
Les mathématiques appliquées et le calcul scientifique jouent un rôle croissant comme outils non évitables pour l’élaboration de recherches scientifiques et dans la conception de processus industriels. Le calcul scientifique reste pour toujours l’étape première de la voie du développement culturel et technique d’un pays donné.
Par ailleurs, le niveau de complexité des systèmes, généralement manipulés par les êtres humains que nous sommes, est très élevé à un niveau où toute avancée intellectuelle engendrera des retombés au niveau industriel tant que tous les processus de l’économie en dépendent.
En contre partie, la majorité des produits technologiques sont juste la solution immédiate de bon nombre de résolutions de requête de la vie courante. L'avènement de l'informatique et de ses produits, les langages de programmation de tout bord, de l'Internet et des télécommunications, à chacun ses infrastructures et ses protocoles, a révolutionné les méthodologies de travail des équipes et laboratoires de recherches. Les langages de développement informatique des outils et suites logiciels sont d’un grand secours aux travaux de modélisation et de simulation des processus.
Les mathématiques appliquées et l'informatique sont les moyens de conception (Modélisation et Simulation), plus encore, ils sont les vecteurs qui ont provoqué une amélioration nette dans les pratiques de tous les jours et aussi dans la vitesse de mise en œuvre de moyens exploitables.
Les langage de programmation, comme le C/C++, le FORTRAN ou le Python ont joué un grand rôle dans le cours de développement de beaucoup de procédés (Modélisation) et ont facilité la compréhension de beaucoup phénomènes (Simulation).
Cryptography is both an art and a science – the use of deception and mathematics, to hide, transmit, and receive data. This short course covers Cryptography as it relates to the CISSP certification. The full video course is located here: http://resources.infosecinstitute.com/cryptography-CISSP-use-of-cryptography
An introductory presentation on cryptography. From ancient ciphers to modern public key encryption, it follows the evolution of a science and how it affects society.
Today in modern era of internet we share some sensitive data to information transmission. but need to ensure security. So we focus on Cryptography modern technique for secure transmission of information over network.
Présentation de l'appication Nao Beer Buddybbourgois
Présentation à Nao sur Seine le 22 octobre 2013.
* Retour sur le concours Paddy buddy.
* Démo de l'application.
* Retour sur quelques points techniques
* Axes d'amélioration.
La dernière génération des bases de données ont les particularités suivante :
Être non relationnel, distribuée , open source et scalable.
Ce mouvement commence en 2009 et est entrain de grandir rapidement et avec beaucoup d'engouement.
La conférence a pour but de présenté les principales base noSql accessible en python. Elle sera agrémentée pour chaque base de donnée (environ 4, 10 min chacune) d'une présentation informative, d'une modélisation de schéma et d'un exemple d'application accédant au donnée (en python).
An introduction to computer vision in Python, from the general concept to its implementation with some current open-source libraries. Demonstrates a selection of basic computer vision examples using SciPy, OpenCV and Pygame.
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.
Les mathématiques appliquées et le calcul scientifique jouent un rôle croissant comme outils non évitables pour l’élaboration de recherches scientifiques et dans la conception de processus industriels. Le calcul scientifique reste pour toujours l’étape première de la voie du développement culturel et technique d’un pays donné.
Par ailleurs, le niveau de complexité des systèmes, généralement manipulés par les êtres humains que nous sommes, est très élevé à un niveau où toute avancée intellectuelle engendrera des retombés au niveau industriel tant que tous les processus de l’économie en dépendent.
En contre partie, la majorité des produits technologiques sont juste la solution immédiate de bon nombre de résolutions de requête de la vie courante. L'avènement de l'informatique et de ses produits, les langages de programmation de tout bord, de l'Internet et des télécommunications, à chacun ses infrastructures et ses protocoles, a révolutionné les méthodologies de travail des équipes et laboratoires de recherches. Les langages de développement informatique des outils et suites logiciels sont d’un grand secours aux travaux de modélisation et de simulation des processus.
Les mathématiques appliquées et l'informatique sont les moyens de conception (Modélisation et Simulation), plus encore, ils sont les vecteurs qui ont provoqué une amélioration nette dans les pratiques de tous les jours et aussi dans la vitesse de mise en œuvre de moyens exploitables.
Les langage de programmation, comme le C/C++, le FORTRAN ou le Python ont joué un grand rôle dans le cours de développement de beaucoup de procédés (Modélisation) et ont facilité la compréhension de beaucoup phénomènes (Simulation).
Cryptography is both an art and a science – the use of deception and mathematics, to hide, transmit, and receive data. This short course covers Cryptography as it relates to the CISSP certification. The full video course is located here: http://resources.infosecinstitute.com/cryptography-CISSP-use-of-cryptography
An introductory presentation on cryptography. From ancient ciphers to modern public key encryption, it follows the evolution of a science and how it affects society.
Today in modern era of internet we share some sensitive data to information transmission. but need to ensure security. So we focus on Cryptography modern technique for secure transmission of information over network.
This presentation deals with the basic concepts of cryptography, its algorithms and examples. Special attention is devoted to Advanced Encryption Standard and its practical implementation in a .NET project.
This presentation by Volodymyr Korobeynyk (C# Software Engineer) was delivered at GlobalLogic Kharkiv .NET Conference on July 5, 2016.
I presented this overview lecture at Computer Applications for the 21st century – Synergies and Vistas organized by Vidyasagar College, Kolkata in 2008
Malware Analysis par Mohamed Ali FATHI - BSides Algiers 2k15Shellmates
Aujourd'hui les Logiciels malveillants sont une menace sérieuse de la sécurité des systèmes d’information, spécialement les malware jamais vus avant.
L'objectif de cette conférence est de venir en aide aux professionnels de la sécurité de l’information (Response team, forensic investigator, …) afin d’aborder efficacement ce genre de menace, elle servira de guide pour faire de l'analyse de Malware en fournissant : des définitions, des techniques, des outils à utiliser, une méthodologie et surtout des exemples et études de cas du monde réel.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
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.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
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.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
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.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
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.
6. 6Solutions www.domain.comCb_salah_salah@esi.dz
History of cryptography
Transposition Cipher
It is another type of cipher where the
order of the alphabets in the plaintext
is rearranged to create the ciphertext.
The actual plaintext alphabets are not
replaced.
Playfair Cipher
In this scheme, pairs of letters are encrypted,
instead of single letters as in the case of simple
substitution cipher
The Vigenere code
It uses a text string (say, a word) as a key, which
is then used for doing a number of shifts on the
plaintext
.
The code of CAESAR
It is a mono-alphabetic cipher
wherein each letter of the plaintext is
substituted by another letter to form
the ciphertex
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Exemple:Caesar1
DLWFE TNT DYLVP UP GZFD OTD WP XZE AZFC
ALDDPC WP RCZD NSTPY OF QLXPFI NPDLC
DTTZTSLNYPLA
offset is 15
SALUT ICI SNAKE JE VOUS DIS LE MOT POUR
PASSER LE GROS CHIEN DU FAMEUX CESAR
SIIOIHACNEAP
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Exemple: Vigenere2
The sender and the receiver decide on a key. Say ‘point’ is the key. Numeric representation of this key is ‘16
15 9 14 20’.
The sender wants to encrypt the message, say ‘attack from south east’. He will arrange plaintext and numeric
key as follows:
a t t a c k f r o m s o u t h e a s t
16 15 9 14 20 16 15 9 14 20 16 15 9 14 20 16 15 9 14
The Cipher text will be as follows
Q I C O W A U A C G I D D H B U P B H
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Exemple: Playfair Cipher3
T U O R I
A L S B C
D E F G H
K M N P Q
V W X Y Z
HI DE MO NE YZ
T U O R I
A L S B C
D E F G H
K M N P Q
V W X Y Z
T U O R I
A L S B C
D E F G H
K M N P Q
V W X Y Z
T U O R I
A L S B C
D E F G H
K M N P Q
V W X Y Z
The sender and the receiver deicide on a particular key, say ‘tuorials’
Let us say we want to encrypt the message “hide money”. It will be written as:
Using these rules, the result of the encryption of ‘hide money’ with the key of ‘tuorials’
would be:
QC EF NU MF ZV
10. 10Solutions www.domain.com
Exemple: Transposition Cipher3
The plaintext is “golden statue is in eleventh cave” and the secret random key chosen is “five”. We arrange this
text horizontally in table with number of column equal to key value. The resulting text is shown below.
G O L D E
N S T A T
U E I S I
N E L E V
E N T H C
A V E
The ciphertext is obtained by reading column vertically downward from first to last column. The ciphertext is
‘gnuneaoseenvltiltedasehetivc’.
12. 12Solutions www.domain.com
• Basicly used in e-commerce but it is
also used in bleu cardes and some
softwares like opnessh(secure
communication using ssh protocol)
• Was first created by Ron Rivest,
Adi Shamir et LenAdleman, en 1977 )
Cb_salah_salah@esi.dz
Asymmetric cryptography : RSA
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RSA: How Does it Work?
World of cryptography
A single key used for
encryption and
decryption
Called private key
Ex: Ceasar
Two keys are used
One for encryption, known by
every one, called public key.
The other one for decryption,
known only by the receiver,
called private key .
Ex :RSA
Symmetric
cryptography
Asymmetric
cryptography
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RSA: How to create public and private key?
Public Key: (N,C)
• P ,Q: two prime number
• N=P×Q
• M=(P−1)×(Q−1
• C :coprime number with M
Private Key: (N,U)
• Need to calcualte U
• Theory of Etienne Bézout: to prove
that two numbers a and b are
coprime if only existed two
number u and v that for
a×u+b×v=1 ( u and v are integers)
• It existed u v for that for
C×u+M×v=1
18. 18Solutions www.domain.comCb_salah_salah@esi.dz
RSA: Real keys exemple
N = 31074182404900437213507500358885679300373460228427275457201619488232064405
18081504556346829671723286782437916272838033415471073108501919548529007337
724822783525742386454014691736602477652346609
P = 16347336458092538484431338838650908598417836700330
92312181110852389333100104508151212118167511579
Q = 1900871281664822113126851573935413975471896789968
515493666638539088027103802104498957191261465571
80 processors Opteron 2.2GHz for 5 months to find P and Q