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Intro to cryptography was part of a presentation showing problems that cryptography solves. How to Communicate With Secret Messages? How to Hide Message Existence? How to Send Secure Emails? and more...

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Basic techniques in cryptography

What is cryptography,its types,two algorithms i.e RSA and DES.
explained well and referenced the slide share too to give more precise presentation. Thank you.

Cryptography 101

This is a part of python for hackers series conducted at BMSCE in collaboration with IEEE student chapter.

Cryptography and Information Security

The presentation describes basics of cryptography and information security. It covers goals of cryptography, history of cipher symmetric and public key cryptography

Cryptography

This document discusses cryptography and its history. Cryptography began as early as 2000 BC in Egypt and has evolved over three eras: the manual era involving pen and paper ciphers, the mechanical era with the invention of cipher machines, and the modern era utilizing computers. Modern cryptography combines computer science and mathematics to encrypt data for security. Key aspects include encryption, decryption, symmetric and asymmetric keys, and different cipher algorithms. The document also covers categories of cryptography, notable cryptographers, applications, and some limitations of early cryptography techniques.

Applied Cryptography

This document provides an overview of applied cryptography. It begins with definitions of cryptography and discusses techniques like Caesar ciphers and attacks on those ciphers. It then covers cryptographic objectives of confidentiality, integrity, authenticity and non-repudiation. The document summarizes hash functions, symmetric cryptography using keys, asymmetric cryptography using public/private key pairs, digital signatures, and authentication techniques. It provides examples of encrypting and decrypting messages as well as generating and verifying digital signatures for sender authentication and message integrity.

Cryptography cse,ru

This presentation contains the basics of cryptography. I have developed this presentation as a course material of Cryptography during my honors final year examination

overview of cryptographic techniques

This document provides an overview of cryptographic techniques, including:
- Basic terminology related to cryptography like plaintext, ciphertext, encryption, decryption, etc.
- Conventional encryption principles like the use of algorithms and secret keys.
- Characteristics of cryptographic techniques like symmetric vs asymmetric encryption.
- Classical symmetric encryption algorithms like the Caesar cipher, monoalphabetic cipher, Playfair cipher, polyalphabetic ciphers like the Vigenère cipher, and transposition ciphers.
- Principles of modern block ciphers like DES, including the use of Feistel networks, confusion and diffusion properties, and encryption/decryption processes.

cryptography

its all about cryptography introduction ......
not at advanced level but you can know basics of what actually cryptography is ...eliminating history and going to the point

Basic techniques in cryptography

What is cryptography,its types,two algorithms i.e RSA and DES.
explained well and referenced the slide share too to give more precise presentation. Thank you.

Cryptography 101

This is a part of python for hackers series conducted at BMSCE in collaboration with IEEE student chapter.

Cryptography and Information Security

The presentation describes basics of cryptography and information security. It covers goals of cryptography, history of cipher symmetric and public key cryptography

Cryptography

This document discusses cryptography and its history. Cryptography began as early as 2000 BC in Egypt and has evolved over three eras: the manual era involving pen and paper ciphers, the mechanical era with the invention of cipher machines, and the modern era utilizing computers. Modern cryptography combines computer science and mathematics to encrypt data for security. Key aspects include encryption, decryption, symmetric and asymmetric keys, and different cipher algorithms. The document also covers categories of cryptography, notable cryptographers, applications, and some limitations of early cryptography techniques.

Applied Cryptography

This document provides an overview of applied cryptography. It begins with definitions of cryptography and discusses techniques like Caesar ciphers and attacks on those ciphers. It then covers cryptographic objectives of confidentiality, integrity, authenticity and non-repudiation. The document summarizes hash functions, symmetric cryptography using keys, asymmetric cryptography using public/private key pairs, digital signatures, and authentication techniques. It provides examples of encrypting and decrypting messages as well as generating and verifying digital signatures for sender authentication and message integrity.

Cryptography cse,ru

This presentation contains the basics of cryptography. I have developed this presentation as a course material of Cryptography during my honors final year examination

overview of cryptographic techniques

This document provides an overview of cryptographic techniques, including:
- Basic terminology related to cryptography like plaintext, ciphertext, encryption, decryption, etc.
- Conventional encryption principles like the use of algorithms and secret keys.
- Characteristics of cryptographic techniques like symmetric vs asymmetric encryption.
- Classical symmetric encryption algorithms like the Caesar cipher, monoalphabetic cipher, Playfair cipher, polyalphabetic ciphers like the Vigenère cipher, and transposition ciphers.
- Principles of modern block ciphers like DES, including the use of Feistel networks, confusion and diffusion properties, and encryption/decryption processes.

cryptography

its all about cryptography introduction ......
not at advanced level but you can know basics of what actually cryptography is ...eliminating history and going to the point

Cryptography

Cryptography is the science of using mathematics to encrypt and decrypt data. It enables sensitive information to be stored or transmitted securely by encoding it into an unintelligible format called cipher text that can only be decoded by authorized parties. Some key cryptography terms include plain text, which is the original understandable message, cipher text, which is the encrypted message, and a key, which is critical information known only to the sender and receiver that is used in the encoding and decoding processes.

basic encryption and decryption

1. Encryption involves encoding messages so their meaning is obscured, while decryption is the reverse process of decoding encrypted messages.
2. Classical encryption techniques include symmetric key encryption where senders and receivers share a common key, and asymmetric key encryption which uses public and private key pairs.
3. Symmetric ciphers like the Caesar cipher and Vigenere cipher use substitution or transposition of letters to encrypt messages, while transposition ciphers rearrange letters in the message. Modern algorithms like Triple DES and Blowfish are also summarized.

Elementry Cryptography

Basic of Elementry Cryptography. Types of cryptography & broad categorization of Encryption algorithm

Post quantum cryptography - thesis

This document discusses post-quantum cryptography and code-based cryptosystems as an alternative that is secure against quantum computers. It describes the McEliece cryptosystem, which uses error correcting codes, and introduces staircase generator codes and randomly split staircase generator codes to improve efficiency and security. The randomly split staircase generator codes cryptosystem allows for both encryption and digital signatures using efficient procedures while providing 80-bit security levels against quantum attacks, though it has large key sizes of around 10 megabytes.

Authenticated Encryption Gcm Ccm

Thiese are the slides used for presenting the Authenticated Encryption GCM - CCM document by Lorenzo Peraldo and Vittorio Picco.

Post quantum cryptography

This document discusses post-quantum cryptography and code-based cryptography as a potential solution. It provides an overview of cryptography, both symmetric and asymmetric, and explains how quantum computers could break many current systems by solving mathematical problems efficiently. Code-based cryptography is introduced as an alternative that does not rely on these vulnerable problems. The McEliece cryptosystem and Staircase code-based schemes are described. The document then outlines a project to implement a random split of Staircase codes to thwart information set decoding attacks, including researching the topic, developing implementations, validating the approach works as intended, and verifying the results against benchmarks. It emphasizes that development should begin now to have solutions ready when needed.

TakeDownCon Rocket City: Cryptanalysis by Chuck Easttom

Cryptanalysis involves attempting to decrypt encrypted messages without access to the encryption key. It is difficult and not guaranteed to work. There are different levels of success for cryptanalysis attacks including fully deducing the key or gaining some information without the key. Common cryptanalysis techniques include frequency analysis, known/chosen plaintext attacks, related-key attacks, linear cryptanalysis, and differential cryptanalysis. These techniques aim to exploit weaknesses in encryption algorithms and reduce the number of possible keys rather than using brute force.

Ch02...1

The document summarizes classical encryption techniques, including:
- Symmetric encryption uses a shared key between sender and receiver for encryption/decryption.
- Early techniques included the Caesar cipher (shifting letters), monoalphabetic cipher (mapping each letter to another), and Playfair cipher (encrypting letter pairs).
- The Vigenère cipher improved security by using a keyword to select different Caesar ciphers for successive letters, making it a polyalphabetic cipher.

A Concise Introduction to Cryptographic Concepts

A Concise Introduction to Cryptographic Concepts by Gokul Alex in the ALTERED 2020 Virtual Conference Organised by IEEE Kerala Section in MBCET. This session covers the historic emergence of cryptographic schemes such as Ceaser Cipher, Substitution Cipher, Transposition Cipher, Vigenre Cipher, Vernam Cipher, One Time Pad, RSA, Diffie Hellman, Elliptic Curves, Hash Algorithms etc.

Cryptography

This document provides an introduction to cryptography. It discusses the basic terms, notations, and structures of cryptography including private and public key cryptography examples. It also discusses modern secret key ciphers, encryption, attacks on ciphers, and the design of private key ciphers. The document contains examples of the Caesar cipher and a toy example of private and public key cryptography. It outlines principles of private key encryption and applications of modern cryptography.

Crpto ppt

This document provides an overview of cryptography. It discusses security threats and goals, then defines cryptography as using mathematics to encrypt and decrypt data. It describes basic terms like plaintext, encryption, ciphertext, and decryption. The document outlines symmetric and asymmetric key cryptography, and examples of techniques like transposition ciphers, substitution ciphers, stream ciphers, and block ciphers. It concludes that cryptography should be used to implement network security and prevent data leakage through encryption and decryption techniques.

Information Security Cryptography ( L03- Old Cryptography Algorithms )

This document discusses old encryption algorithms from the classical method of cryptography, including replacement algorithms, the Caesar cipher, Vigenere cipher, Atbash cipher, and Affine cipher. It also describes the Jefferson cylinder, one of the strongest encryption devices of the time which was nearly unbreakable without stealing the entire device.

Secret key cryptography

This document summarizes classical encryption techniques such as secret key cryptography, stream ciphers, block ciphers, substitution techniques like the Caesar cipher and Playfair cipher, polyalphabetic ciphers like the Vigenère cipher, and the theoretically unbreakable one-time pad cipher. It explains the basic components and workings of these classical encryption schemes.

Cryptography & network security

This document provides an overview of cryptography and network security concepts. It defines security services according to standards and categorizes them into authentication, access control, data confidentiality, data integrity, and non-repudiation. It describes security mechanisms, types of attacks, classical encryption techniques like the Caesar cipher and cryptanalysis methods. Symmetric and public key encryption, block ciphers, and standards like AES and Triple DES are also summarized.

Cryptography by gaurav singh

Cryptography involves encrypting information to keep it secret or authenticate its source. There are three main types: public key cryptography uses two keys, symmetric key cryptography uses a single secret key, and hash functions create unique fingerprints of data without keys. Cryptography is used to securely transmit data, authenticate users, digitally sign messages, and verify data integrity.

cryptography and network security

Cryptography is the practice of secure communication in the presence of attackers. It allows people like Andy to send private messages to friends like Sam over public channels like WhatsApp. Encryption uses algorithms and keys to encode messages during transmission and decrypt them upon arrival. Symmetric key cryptography uses a shared private key while asymmetric key cryptography uses separate public and private keys. Popular algorithms include RSA, which uses a variable key size, and AES for block encryption. Tokenization substitutes sensitive data with non-sensitive tokens to enhance security, and JSON web tokens (JWTs) are commonly used to securely transmit information between parties in a JSON object and authenticate users via bearer authorization in headers.

Chapter 8 cryptography lanjutan

This document discusses the history and concepts of cryptography. It begins with classical cryptography and how encryption has evolved with computers to become more complex. It then covers specific ciphers like the Enigma machine and how the British broke German codes during WWII. The document discusses the development of modern ciphers like DES and AES, how public key cryptography works using RSA, and concepts of symmetric and asymmetric encryption. It provides details on block ciphers and the design of ciphers like DES.

Cns 1

The document provides an overview of cryptography and network security. It discusses various types of attacks such as interception, modification, and fabrication. It then covers important security concepts like confidentiality and authentication. The document outlines classical cryptographic techniques including substitution and transposition ciphers. Specific ciphers like the Caesar cipher, Playfair cipher, Hill cipher, and the Vigenère cipher are described along with their encryption processes and cryptanalysis methods. Modern cryptographic techniques such as the one-time pad are also summarized.

Symmetric ciphermodel

Symmetric Cipher Model,BruteForce attack, Cryptanalysis,Advantages of Symmetric cryptosystem,Model of conventional Encryption, model of conventional cryptosystem,Cryptography,Ciphertext,Plaintext,Decryption algorithm,Diadvantages of Symmetric Cryptosystem,Types of attacks on encrypted messages,Average time required for exhaustive key search

Classical Encryption Techniques

The document discusses classical encryption techniques, including symmetric encryption which uses the same key for encryption and decryption. It describes ciphers like the Caesar cipher which substitutes letters by shifting the alphabet, the monoalphabetic cipher with one substitution table, and the polyalphabetic Vigenère cipher which uses multiple substitution alphabets. The document also covers the Playfair cipher which encrypts letters in pairs using a 5x5 keyword matrix, and discusses cryptanalysis techniques for breaking classical ciphers.

Asymmetric Cryptography

An introduction to asymmetric cryptography with an in-depth look at RSA, Diffie-Hellman, the FREAK and LOGJAM attacks on TLS/SSL, and the "Mining your P's and Q's attack".

PresentationonCRYPTOGRAPHY.pptx

This document provides an overview of cryptography. It begins with defining cryptography as the practice of hiding information and discusses its purposes, which include authentication, privacy, integrity, and non-repudiation. The document then covers the basic architecture of cryptography systems and the main types, including secret key cryptography and public key cryptography. It also outlines some common cryptographic algorithms like hashing and public/private key cryptography. Finally, it briefly discusses different types of attacks on cryptography and concludes with references.

Cryptography

Cryptography is the science of using mathematics to encrypt and decrypt data. It enables sensitive information to be stored or transmitted securely by encoding it into an unintelligible format called cipher text that can only be decoded by authorized parties. Some key cryptography terms include plain text, which is the original understandable message, cipher text, which is the encrypted message, and a key, which is critical information known only to the sender and receiver that is used in the encoding and decoding processes.

basic encryption and decryption

1. Encryption involves encoding messages so their meaning is obscured, while decryption is the reverse process of decoding encrypted messages.
2. Classical encryption techniques include symmetric key encryption where senders and receivers share a common key, and asymmetric key encryption which uses public and private key pairs.
3. Symmetric ciphers like the Caesar cipher and Vigenere cipher use substitution or transposition of letters to encrypt messages, while transposition ciphers rearrange letters in the message. Modern algorithms like Triple DES and Blowfish are also summarized.

Elementry Cryptography

Basic of Elementry Cryptography. Types of cryptography & broad categorization of Encryption algorithm

Post quantum cryptography - thesis

This document discusses post-quantum cryptography and code-based cryptosystems as an alternative that is secure against quantum computers. It describes the McEliece cryptosystem, which uses error correcting codes, and introduces staircase generator codes and randomly split staircase generator codes to improve efficiency and security. The randomly split staircase generator codes cryptosystem allows for both encryption and digital signatures using efficient procedures while providing 80-bit security levels against quantum attacks, though it has large key sizes of around 10 megabytes.

Authenticated Encryption Gcm Ccm

Thiese are the slides used for presenting the Authenticated Encryption GCM - CCM document by Lorenzo Peraldo and Vittorio Picco.

Post quantum cryptography

This document discusses post-quantum cryptography and code-based cryptography as a potential solution. It provides an overview of cryptography, both symmetric and asymmetric, and explains how quantum computers could break many current systems by solving mathematical problems efficiently. Code-based cryptography is introduced as an alternative that does not rely on these vulnerable problems. The McEliece cryptosystem and Staircase code-based schemes are described. The document then outlines a project to implement a random split of Staircase codes to thwart information set decoding attacks, including researching the topic, developing implementations, validating the approach works as intended, and verifying the results against benchmarks. It emphasizes that development should begin now to have solutions ready when needed.

TakeDownCon Rocket City: Cryptanalysis by Chuck Easttom

Cryptanalysis involves attempting to decrypt encrypted messages without access to the encryption key. It is difficult and not guaranteed to work. There are different levels of success for cryptanalysis attacks including fully deducing the key or gaining some information without the key. Common cryptanalysis techniques include frequency analysis, known/chosen plaintext attacks, related-key attacks, linear cryptanalysis, and differential cryptanalysis. These techniques aim to exploit weaknesses in encryption algorithms and reduce the number of possible keys rather than using brute force.

Ch02...1

The document summarizes classical encryption techniques, including:
- Symmetric encryption uses a shared key between sender and receiver for encryption/decryption.
- Early techniques included the Caesar cipher (shifting letters), monoalphabetic cipher (mapping each letter to another), and Playfair cipher (encrypting letter pairs).
- The Vigenère cipher improved security by using a keyword to select different Caesar ciphers for successive letters, making it a polyalphabetic cipher.

A Concise Introduction to Cryptographic Concepts

A Concise Introduction to Cryptographic Concepts by Gokul Alex in the ALTERED 2020 Virtual Conference Organised by IEEE Kerala Section in MBCET. This session covers the historic emergence of cryptographic schemes such as Ceaser Cipher, Substitution Cipher, Transposition Cipher, Vigenre Cipher, Vernam Cipher, One Time Pad, RSA, Diffie Hellman, Elliptic Curves, Hash Algorithms etc.

Cryptography

This document provides an introduction to cryptography. It discusses the basic terms, notations, and structures of cryptography including private and public key cryptography examples. It also discusses modern secret key ciphers, encryption, attacks on ciphers, and the design of private key ciphers. The document contains examples of the Caesar cipher and a toy example of private and public key cryptography. It outlines principles of private key encryption and applications of modern cryptography.

Crpto ppt

This document provides an overview of cryptography. It discusses security threats and goals, then defines cryptography as using mathematics to encrypt and decrypt data. It describes basic terms like plaintext, encryption, ciphertext, and decryption. The document outlines symmetric and asymmetric key cryptography, and examples of techniques like transposition ciphers, substitution ciphers, stream ciphers, and block ciphers. It concludes that cryptography should be used to implement network security and prevent data leakage through encryption and decryption techniques.

Information Security Cryptography ( L03- Old Cryptography Algorithms )

This document discusses old encryption algorithms from the classical method of cryptography, including replacement algorithms, the Caesar cipher, Vigenere cipher, Atbash cipher, and Affine cipher. It also describes the Jefferson cylinder, one of the strongest encryption devices of the time which was nearly unbreakable without stealing the entire device.

Secret key cryptography

This document summarizes classical encryption techniques such as secret key cryptography, stream ciphers, block ciphers, substitution techniques like the Caesar cipher and Playfair cipher, polyalphabetic ciphers like the Vigenère cipher, and the theoretically unbreakable one-time pad cipher. It explains the basic components and workings of these classical encryption schemes.

Cryptography & network security

This document provides an overview of cryptography and network security concepts. It defines security services according to standards and categorizes them into authentication, access control, data confidentiality, data integrity, and non-repudiation. It describes security mechanisms, types of attacks, classical encryption techniques like the Caesar cipher and cryptanalysis methods. Symmetric and public key encryption, block ciphers, and standards like AES and Triple DES are also summarized.

Cryptography by gaurav singh

Cryptography involves encrypting information to keep it secret or authenticate its source. There are three main types: public key cryptography uses two keys, symmetric key cryptography uses a single secret key, and hash functions create unique fingerprints of data without keys. Cryptography is used to securely transmit data, authenticate users, digitally sign messages, and verify data integrity.

cryptography and network security

Cryptography is the practice of secure communication in the presence of attackers. It allows people like Andy to send private messages to friends like Sam over public channels like WhatsApp. Encryption uses algorithms and keys to encode messages during transmission and decrypt them upon arrival. Symmetric key cryptography uses a shared private key while asymmetric key cryptography uses separate public and private keys. Popular algorithms include RSA, which uses a variable key size, and AES for block encryption. Tokenization substitutes sensitive data with non-sensitive tokens to enhance security, and JSON web tokens (JWTs) are commonly used to securely transmit information between parties in a JSON object and authenticate users via bearer authorization in headers.

Chapter 8 cryptography lanjutan

This document discusses the history and concepts of cryptography. It begins with classical cryptography and how encryption has evolved with computers to become more complex. It then covers specific ciphers like the Enigma machine and how the British broke German codes during WWII. The document discusses the development of modern ciphers like DES and AES, how public key cryptography works using RSA, and concepts of symmetric and asymmetric encryption. It provides details on block ciphers and the design of ciphers like DES.

Cns 1

The document provides an overview of cryptography and network security. It discusses various types of attacks such as interception, modification, and fabrication. It then covers important security concepts like confidentiality and authentication. The document outlines classical cryptographic techniques including substitution and transposition ciphers. Specific ciphers like the Caesar cipher, Playfair cipher, Hill cipher, and the Vigenère cipher are described along with their encryption processes and cryptanalysis methods. Modern cryptographic techniques such as the one-time pad are also summarized.

Symmetric ciphermodel

Symmetric Cipher Model,BruteForce attack, Cryptanalysis,Advantages of Symmetric cryptosystem,Model of conventional Encryption, model of conventional cryptosystem,Cryptography,Ciphertext,Plaintext,Decryption algorithm,Diadvantages of Symmetric Cryptosystem,Types of attacks on encrypted messages,Average time required for exhaustive key search

Classical Encryption Techniques

The document discusses classical encryption techniques, including symmetric encryption which uses the same key for encryption and decryption. It describes ciphers like the Caesar cipher which substitutes letters by shifting the alphabet, the monoalphabetic cipher with one substitution table, and the polyalphabetic Vigenère cipher which uses multiple substitution alphabets. The document also covers the Playfair cipher which encrypts letters in pairs using a 5x5 keyword matrix, and discusses cryptanalysis techniques for breaking classical ciphers.

Cryptography

Cryptography

basic encryption and decryption

basic encryption and decryption

Elementry Cryptography

Elementry Cryptography

Post quantum cryptography - thesis

Post quantum cryptography - thesis

Authenticated Encryption Gcm Ccm

Authenticated Encryption Gcm Ccm

Post quantum cryptography

Post quantum cryptography

TakeDownCon Rocket City: Cryptanalysis by Chuck Easttom

TakeDownCon Rocket City: Cryptanalysis by Chuck Easttom

Ch02...1

Ch02...1

A Concise Introduction to Cryptographic Concepts

A Concise Introduction to Cryptographic Concepts

Cryptography

Cryptography

Crpto ppt

Crpto ppt

Information Security Cryptography ( L03- Old Cryptography Algorithms )

Information Security Cryptography ( L03- Old Cryptography Algorithms )

Secret key cryptography

Secret key cryptography

Cryptography & network security

Cryptography & network security

Cryptography by gaurav singh

Cryptography by gaurav singh

cryptography and network security

cryptography and network security

Chapter 8 cryptography lanjutan

Chapter 8 cryptography lanjutan

Cns 1

Cns 1

Symmetric ciphermodel

Symmetric ciphermodel

Classical Encryption Techniques

Classical Encryption Techniques

Asymmetric Cryptography

An introduction to asymmetric cryptography with an in-depth look at RSA, Diffie-Hellman, the FREAK and LOGJAM attacks on TLS/SSL, and the "Mining your P's and Q's attack".

PresentationonCRYPTOGRAPHY.pptx

This document provides an overview of cryptography. It begins with defining cryptography as the practice of hiding information and discusses its purposes, which include authentication, privacy, integrity, and non-repudiation. The document then covers the basic architecture of cryptography systems and the main types, including secret key cryptography and public key cryptography. It also outlines some common cryptographic algorithms like hashing and public/private key cryptography. Finally, it briefly discusses different types of attacks on cryptography and concludes with references.

CISSP Week 16

This document provides an overview of cryptography concepts including:
- A brief history of cryptography from early ciphers like the Caesar cipher to modern computer-based cryptography.
- Key cryptography concepts like public/private key algorithms, hashing, and digital signatures.
- Modern applications of cryptography including encryption of data at rest, in transit, and end-to-end encryption.
- Emerging technologies like quantum cryptography are discussed along with notes of skepticism about current real-world applications.
- International regulations and the needs of law enforcement are also covered at a high level.

Network security

Network security involves securing computer networks and systems. It is handled by network administrators who implement security policies, software, and hardware to protect networks from unauthorized access, misuse, or denial of resources. Network security aims to authenticate users, control access to resources, and ensure confidentiality, integrity, non-repudiation and availability of networks and resources. Common methods include authentication, access control, encryption, digital signatures, and monitoring systems for security audits.

Introduction to cryptography

Bob and Alice want to securely communicate messages between each other over an insecure channel. Cryptography allows them to encrypt messages using public key encryption so that only the intended recipient can decrypt it. The document discusses the basics of public key cryptography including how it works, the RSA algorithm, key generation process, and approaches to attacking public key cryptography like brute force attacks or mathematical attacks like integer factorization to derive the private key.

3 pkc+rsa

Public-key cryptography uses two keys: a public key that can encrypt messages and verify signatures, and a private key known only to the recipient that decrypts messages and signs them. RSA is an example of an asymmetric encryption algorithm that is widely used, using a public and private key pair generated from large prime numbers. It allows easy encryption with the public key but mathematically secure decryption only with the corresponding private key.

Pooguzhali

This document discusses public key cryptography and the RSA algorithm. It provides explanations of public key encryption including its key components like plaintext, encryption algorithm, public and private keys, and decryption algorithm. It then describes the conventional encryption method versus public key encryption. Finally, it explains the RSA algorithm in detail, including how it generates key pairs, how encryption and decryption works using the keys, and some of the mathematical concepts that make RSA secure like the difficulty of factoring large numbers.

PUBLIC KEY & RSA.ppt

Public key cryptography uses two keys - a public key that can be shared openly and a private key that is kept secret. The RSA algorithm, invented in 1977, is the most widely used public key cryptosystem. It uses a public and private key pair generated from two large prime numbers. The public key is used to encrypt messages, while the private key is used to decrypt messages. The security of RSA relies on the difficulty of factoring the product of the two primes.

CISSP Week 20

This document provides an overview of asymmetric cryptography, including its history and key concepts. It discusses how asymmetric cryptography uses key pairs, with one key kept private and one shared publicly. Common asymmetric algorithms are described such as RSA, Diffie-Hellman, El Gamal, and Elliptic Curve Cryptography. The document also covers hashing, message authentication codes, digital signatures, and key management considerations.

Public Key Cryptography and RSA algorithm

Public Key Cryptography and RSA algorithm.Explanation and proof of RSA algorithm in details.it also describer the mathematics behind the RSA. Few mathematics theorem are given which are use in the RSA algorithm.

Cryptography and network security

This presentation introduces the Basics of Cryptography and Network Security concepts. Heavily derived from content from William Stalling's book with the same title.

Cryptography

The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.

Cryptography seminar 2017

This document summarizes a seminar on cryptography presented by Ashish. It defines cryptography as the science of encrypting messages to make them secure. It outlines the basic terms used in cryptography like plaintext, ciphertext, encryption, and decryption. It describes the different categories of cryptography including secret key cryptography, public key cryptography, and hash functions. Popular algorithms for encryption like DES, AES, RSA, and algorithms for hashing like MD5 and SHA are also mentioned. Finally, it discusses applications of cryptography in areas like defense, e-commerce, and data security and provides references used for the seminar.

OpenPGP/GnuPG Encryption

A talk I gave to the Triangle Linux Users Group ( http://www.trilug.org/ ) on 11-April-2002 on Gnu Privacy Guard.

White Paper on Cryptography

Cryptography is the process of securing communication and information. It involves encrypting plaintext into ciphertext using algorithms and decrypting the ciphertext back to plaintext. The main goals of cryptography are confidentiality, integrity, non-repudiation, authentication, access control, and availability. There are three main types of cryptographic algorithms - secret key cryptography which uses the same key for encryption and decryption, public key cryptography which uses different keys for encryption and decryption, and hash functions which are one-way functions to encrypt information irreversibly. Common cryptographic hash functions include MD5 and SHA-1 which are used to verify integrity of files and messages.

Ch9

This document discusses public key cryptography and the RSA algorithm. It begins by outlining some misconceptions about public key encryption. It then provides an overview of the key concepts behind public key cryptosystems, including the use of public and private key pairs to enable encryption, digital signatures, and key exchange. The document goes on to provide detailed explanations of the RSA algorithm, including how it uses large prime numbers and modular arithmetic to encrypt and decrypt messages securely. It discusses the security of the RSA algorithm and analyzes approaches for attacking it, such as brute force key searching and mathematical attacks based on factoring the private key.

2. public key cryptography and RSA

Public Key Cryptography,Public-Key Cryptosystem,Rivest-Shamir-Adleman (RSA) Scheme,The Security of RSA,Optimal Asymmetric Encryption Padding (OAEP)

Public key algorithm

Public key algorithms like RSA and ElGamal allow for secure encryption without a shared private key. RSA uses a public and private key pair generated from large prime numbers such that a message encrypted with the public key can only be decrypted by the corresponding private key. It is widely used due to its security being based on the difficulty of factoring large numbers, though it is less efficient than symmetric algorithms due to involving modular exponentiation. ElGamal also uses a public/private key approach and its security relies on the discrete logarithm problem.

RSA Algm.pptx

Public key cryptography uses two keys - a public key for encryption and a private key for decryption. The RSA algorithm is a widely used public key cryptosystem that is based on the difficulty of factoring large prime numbers. It uses a public key for encryption and a related private key for decryption. The security of RSA relies on the fact that it is computationally infeasible to determine the private key from the public key for sufficiently large key sizes.

Rsa

Public Key Cryptography uses two keys - a public key that can encrypt messages and verify signatures, and a private key that can decrypt messages and create signatures. The RSA algorithm, the most widely used public key algorithm, is based on the mathematical difficulty of factoring large prime numbers. It works by having users generate a public/private key pair using two large prime numbers and performing modular exponentiation. The security of RSA relies on the fact that it is computationally infeasible to derive the private key from the public key and modulus.

Asymmetric Cryptography

Asymmetric Cryptography

PresentationonCRYPTOGRAPHY.pptx

PresentationonCRYPTOGRAPHY.pptx

CISSP Week 16

CISSP Week 16

Network security

Network security

Introduction to cryptography

Introduction to cryptography

3 pkc+rsa

3 pkc+rsa

Pooguzhali

Pooguzhali

PUBLIC KEY & RSA.ppt

PUBLIC KEY & RSA.ppt

CISSP Week 20

CISSP Week 20

Public Key Cryptography and RSA algorithm

Public Key Cryptography and RSA algorithm

Cryptography and network security

Cryptography and network security

Cryptography

Cryptography

Cryptography seminar 2017

Cryptography seminar 2017

OpenPGP/GnuPG Encryption

OpenPGP/GnuPG Encryption

White Paper on Cryptography

White Paper on Cryptography

Ch9

Ch9

2. public key cryptography and RSA

2. public key cryptography and RSA

Public key algorithm

Public key algorithm

RSA Algm.pptx

RSA Algm.pptx

Rsa

Rsa

Enums On Steroids - let's look at sealed classes !

These are slides for my session"Enums On Steroids - let's look at sealed classes !" - delivered among others, on Devoxx UK 2024 conference

Hand Rolled Applicative User ValidationCode Kata

Could you use a simple piece of Scala validation code (granted, a very simplistic one too!) that you can rewrite, now and again, to refresh your basic understanding of Applicative operators <*>, <*, *>?
The goal is not to write perfect code showcasing validation, but rather, to provide a small, rough-and ready exercise to reinforce your muscle-memory.
Despite its grandiose-sounding title, this deck consists of just three slides showing the Scala 3 code to be rewritten whenever the details of the operators begin to fade away.
The code is my rough and ready translation of a Haskell user-validation program found in a book called Finding Success (and Failure) in Haskell - Fall in love with applicative functors.

zOS Mainframe JES2-JES3 JCL-JECL Differences

Document which explains the difference between Jes2 and Jes3

一比一原版(USF毕业证)旧金山大学毕业证如何办理

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2开始安排制作毕业证成绩单电子图；
3毕业证成绩单电子版做好以后发送给您确认；
4毕业证成绩单电子版您确认信息无误之后安排制作成品；
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6快递给客户（国内顺丰国外DHLUPS等快读邮寄）。
教育部文凭学历认证认证的用途：
如果您计划在国内发展那么办理国内教育部认证是必不可少的。事业性用人单位如银行国企公务员在您应聘时都会需要您提供这个认证。其他私营 #外企企业无需提供！办理教育部认证所需资料众多且烦琐所有材料您都必须提供原件我们凭借丰富的经验帮您快速整合材料让您少走弯路。
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How to write a program in any programming language

How to write a program in any programming language

Measures in SQL (SIGMOD 2024, Santiago, Chile)

SQL has attained widespread adoption, but Business Intelligence tools still use their own higher level languages based upon a multidimensional paradigm. Composable calculations are what is missing from SQL, and we propose a new kind of column, called a measure, that attaches a calculation to a table. Like regular tables, tables with measures are composable and closed when used in queries.
SQL-with-measures has the power, conciseness and reusability of multidimensional languages but retains SQL semantics. Measure invocations can be expanded in place to simple, clear SQL.
To define the evaluation semantics for measures, we introduce context-sensitive expressions (a way to evaluate multidimensional expressions that is consistent with existing SQL semantics), a concept called evaluation context, and several operations for setting and modifying the evaluation context.
A talk at SIGMOD, June 9–15, 2024, Santiago, Chile
Authors: Julian Hyde (Google) and John Fremlin (Google)
https://doi.org/10.1145/3626246.3653374

Oracle Database 19c New Features for DBAs and Developers.pptx

Oracle Database 19c New Features for DBAs and Developers. This video you can watch from my youtube channel at https://youtu.be/m-F-mZA3MkU

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Project management is a crucial aspect of any organization, ensuring that projects are completed efficiently and effectively. One of the key tools used in project management is the project dashboard, which provides a comprehensive view of project progress and performance. In this article, we will explore the role of project dashboards in project management, highlighting their key features and benefits.

SQL Accounting Software Brochure Malaysia

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Presented at NLJUG's J-Spring 2024.

GreenCode-A-VSCode-Plugin--Dario-Jurisic

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一比一原版(UMN毕业证)明尼苏达大学毕业证如何办理

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2开始安排制作毕业证成绩单电子图；
3毕业证成绩单电子版做好以后发送给您确认；
4毕业证成绩单电子版您确认信息无误之后安排制作成品；
5成品做好拍照或者视频给您确认；
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Artificia Intellicence and XPath Extension Functions

The purpose of this presentation is to provide an overview of how you can use AI from XSLT, XQuery, Schematron, or XML Refactoring operations, the potential benefits of using AI, and some of the challenges we face.

在线购买加拿大英属哥伦比亚大学毕业证本科学位证书原版一模一样

原版一模一样【微信：741003700 】【加拿大英属哥伦比亚大学毕业证本科学位证书】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
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WWDC 2024 Keynote Review: For CocoaCoders Austin

Overview of WWDC 2024 Keynote Address.
Covers: Apple Intelligence, iOS18, macOS Sequoia, iPadOS, watchOS, visionOS, and Apple TV+.
Understandable dialogue on Apple TV+
On-device app controlling AI.
Access to ChatGPT with a guest appearance by Chief Data Thief Sam Altman!
App Locking! iPhone Mirroring! And a Calculator!!

fiscal year variant fiscal year variant.

fiscal year variant

Webinar On-Demand: Using Flutter for Embedded

Flutter is a popular open source, cross-platform framework developed by Google. In this webinar we'll explore Flutter and its architecture, delve into the Flutter Embedder and Flutter’s Dart language, discover how to leverage Flutter for embedded device development, learn about Automotive Grade Linux (AGL) and its consortium and understand the rationale behind AGL's choice of Flutter for next-gen IVI systems. Don’t miss this opportunity to discover whether Flutter is right for your project.

Enums On Steroids - let's look at sealed classes !

Enums On Steroids - let's look at sealed classes !

Hand Rolled Applicative User ValidationCode Kata

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zOS Mainframe JES2-JES3 JCL-JECL Differences

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一比一原版(USF毕业证)旧金山大学毕业证如何办理

一比一原版(USF毕业证)旧金山大学毕业证如何办理

How to write a program in any programming language

How to write a program in any programming language

Measures in SQL (SIGMOD 2024, Santiago, Chile)

Measures in SQL (SIGMOD 2024, Santiago, Chile)

Oracle Database 19c New Features for DBAs and Developers.pptx

Oracle Database 19c New Features for DBAs and Developers.pptx

Project Management: The Role of Project Dashboards.pdf

Project Management: The Role of Project Dashboards.pdf

SQL Accounting Software Brochure Malaysia

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Energy consumption of Database Management - Florina Jonuzi

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J-Spring 2024 - Going serverless with Quarkus, GraalVM native images and AWS ...

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GreenCode-A-VSCode-Plugin--Dario-Jurisic

GreenCode-A-VSCode-Plugin--Dario-Jurisic

Oracle 23c New Features For DBAs and Developers.pptx

Oracle 23c New Features For DBAs and Developers.pptx

一比一原版(UMN毕业证)明尼苏达大学毕业证如何办理

一比一原版(UMN毕业证)明尼苏达大学毕业证如何办理

Artificia Intellicence and XPath Extension Functions

Artificia Intellicence and XPath Extension Functions

在线购买加拿大英属哥伦比亚大学毕业证本科学位证书原版一模一样

在线购买加拿大英属哥伦比亚大学毕业证本科学位证书原版一模一样

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Lecture 2 - software testing SE 412.pptx

WWDC 2024 Keynote Review: For CocoaCoders Austin

WWDC 2024 Keynote Review: For CocoaCoders Austin

fiscal year variant fiscal year variant.

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Webinar On-Demand: Using Flutter for Embedded

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- 1. Intro to Cryptography Galin Dinkov
- 2. Intro
- 3. Definition ● Cryptography - κρυπτό (kryptós) "hidden, secret" + γράφειν (graphein) "writing" ● Cryptology - κρυπτό (kryptós) "hidden, secret" + λογία (logia), "study" ● Study of techniques for secure communication in the presence of third parties called adversaries ● Main fields ○ Data confidentiality - restricted access over the information ○ Data integrity - assurance of the accuracy and consistency of the data ○ Authentication - confirming the validity of sorm form of identification ○ Non-repudiation - assurance of data origin and authorship
- 4. Terminology ● Plaintext - ordinary information, understandable by human ● Ciphertext - unintelligible text, encrypted text ● Encryption - encoding a message or information in such a way that only authorized parties can access it ● Decryption - restoring the original plaintext from the ciphertext ● Cipher - algorithm for encryption/decryption ● Key - a secret parameter used in the encryption/decryption process ● Cryptosystem - definitions, key-generation, enc/dec algorithms ● Symmetric/Asymmetric - single common key / different keys ● Cryptanalysis - acquiring information from encrypted messages without having the secret key
- 5. Common Actors ● Alice and Bob - fictional characters using a cryptosystem ● Eve (eavesdropper) - listening to a private conversation ● Mallory - an active attacker
- 6. History ● Classical cryptography - ancient, medieval ● WWI, WWII - Enigma … ● Modern - computers, public-key, hashing, quantum computing … ● Politics - NSA, NIST ...
- 9. Classic Ciphers ● Transposition cipher - positions of the letters are shifted according to a regular system ● Substitution cipher - plaintext letters are altered according to some rules (key) ○ Simple - per letter ○ Mono/Poly-alphabetic - single, or multiple substitutions ○ Polygraphic - substitute groups of letters Route cipher Caesar cipher Vigenère cipher
- 10. Breaking Classic Ciphers ● Brute-force ● Frequency analysis ● Demo
- 11. Perfect Secrecy ● One-time pad - random key, long at least as the message ● Does not reveal any of the functions of the message, except its maximum length ● Security depends on the entropy of the key ● Difficult to use for long messages ● If reused it is vulnerable
- 12. Stream Cipher ● Generates one time pad using pseudo random number generator ● Then combines it with the message ● The pad is generated based on a key ● Security depends on the entropy of the key and the random function ● Example algorithms - RC4 and ChaCha20 ● Used in hardware because is fast
- 13. Block Cipher ● Divides the message into blocks and encrypt each block ● If the message length is not divisible by block size padding is applied ● Works in different modes: ECB, CBC, PCBC, CFB, OFB, CTR ... ● Examples: DES, 3DES, AES, Blowfish ...
- 15. Steganography Practice of concealing a file, message, image, or video within another file, message, image, or video. ● Physical - invisible ink, microdots, knits, … ● Digital - image, audio, video or other file, text in blogs or forums ● Linguistic - acrostic, misspellings, ... Tools
- 16. How to Ensure Data Integrity?
- 17. Hash Functions Function used to map data of arbitrary size to data of fixed size. ● Cryptographic hash functions - deterministic, one-Way, uniformly distributed, infeasible collisions, quick to compute ● MD 2/4/5/6 - Message-Digest Algorithm ● SHA 1/2/3 - Secure Hash Algorithms ● RIPEMD - RACE Integrity Primitives Evaluation Message Digest ● BLAKE 1/2
- 18. Hash Function Security ● Preimage resistance - hard to find message m from a given hash h = hash(m) ● Second preimage resistance - given a message m1 it should be difficult to find another different message m2 such as hash(m1) = hash(m2) ● Collision resistance - it should be difficult to find to messages m1 and m2 such as hash(m1) = hash(m2) ● Rainbow table - precomputed table for reversing cryptographic hash functions, usually for cracking password hashes ● Birthday attack
- 19. Message Authentication Code (MAC) Short piece of information used to authenticate a message, to confirm that the message came from the stated sender (its authenticity) and has not been changed. ● CBC-MAC ● HMAC ● … ● ● Length-extension attack
- 20. How to Securely Share Common Secret?
- 21. Public-Key Cryptography ● Digital signatures - content is digitally signed with an individual’s private key and is verified by the individual’s public key ● Encryption - content is encrypted using an individual’s public key and can only be decrypted with the individual’s private key ● Authentication – since the individual’s unique private key was used to apply the signature, recipients can be confident that the individual was the one to actually apply the signature ● Non-repudiation – since the individual is the only one with access to the private key used to apply the signature, he/she cannot later claim that it wasn’t him/her who applied the signature ● Integrity - when the signature is verified, it checks that the contents of the document or message match what was in there when the signature was applied. Even the slightest change to the original document would cause this check to fail.
- 23. Math ● One-way function - easy to compute on every input, but hard to invert ● Trapdoor function - easy to compute in one direction, yet difficult to compute in the opposite unless having a special information, called the "trapdoor" ○ Modular arithmetics ○ Discrete logarithm ○ Prime factorization
- 25. RSA - Rivest–Shamir–Adleman ● Invented in 1977 ● Used for digital signatures and securing sessions (SSL) Explanation
- 26. Elliptic curve cryptography (ECC) Explanation: https://youtu.be/dCvB-mhkT0w https://youtu.be/F3zzNa42-tQ ECC Domain Parameters: p - prime field (modulo) a,b - curve parameters G - generator point n - ord(G) (n x G = 0) h - cofactor of n Private Key (k) = Random Number < n - 1 Public Key (K) = k ∗ G K = 1E99423A4ED27608A15A2616A2B0E9E52CED330AC530EDCC32C8FFC6A526AEDD * G K = (x, y) x = F028892BAD7ED57D2FB57BF33081D5CFCF6F9ED3D3D7F159C2E2FFF579DC341A y = 07CF33DA18BD734C600B96A72BBC4749D5141C90EC8AC328AE52DDFE2E505BDB
- 27. Breaking ● Find the private key from the public key ● Classic quantum computer ● Topological quantum computer
- 28. Zero knowledge proofs Method by which one party (the prover) can prove to another party (the verifier) that a given statement is true, without conveying any information apart from the fact that the statement is indeed true.
- 29. How to Send Secure Emails?
- 31. How to Surf the Web Securely?
- 32. SSL/TLS
- 33. Public Key Infrastructure (PKI) ● Certificate Authorities (CA) - X.509 ● Web of Trust ● Blockchain PKI - Emercoin
- 34. How to Surf the Web Privately?
- 35. Tor