Cryptography and Hashing Fundamentals in Python and Java

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In this course you will learn about cryptography and hashing in Python and Java as well. You will understand most of the private key (symmetric) and pubic key (asymmetric) cryptosystems on a step by step basis. You can learn about the theory as well as the implementation for every cryptographic algorithm – and how to crack these systems (so what are the weaknesses).

Chapter 1 – Cryptography Fundamentals

  • what is the aim of cryptography?
  • private key and public key cryptosystems

Chapter 2 – Caesar Cipher

  • Caesar cipher theory and implementation
  • how to crack Caesar cipher
  • frequency analysis and language detection

Chapter 3 – Vigenere Cipher

  • Vigenere cipher theory and implementation
  • how to crack Vigenere cipher with Kasiski-algorithm

Chapter 4 – One Time Pad (Vernam Cipher)

  • random and pseudo-random numbers
  • the XOR logical operator
  • one time pad theory and implementation
  • why is it impossible to crack Vernam cipher?
  • Shannon’s secrecy

Chapter 5 – Data Encryption Standard (DES)

  • data encryption standard (DES) theory and implementation
  • cryptoanalysis techniques
  • linear cryptoanalysis and differential cryptoanalysis

Chapter 6 – Advanced Encryption Standard (AES)

  • advanced encryption standard (AES) theory and implementation
  • Shannon’s confusion and diffusion

Chapter 7 – Asymmetric Cryptosystems

  • problems with private key cryptosystems
  • random numbers and prime numbers in cryptography

Chapter 8 – Modular Arithmetic

  • modular arithmetic fundamentals
  • finding prime numbers – naive approach and advanced algorithms
  • integer factorization problem
  • discrete logarithm problem

Chapter 9 – Diffie-Hellman Key Exchange

  • Diffie-Hellman key exchange algorithm theory and implementation
  • prime numbers and primitive roots
  • man-in-the-middle attack

Chapter 10 – RSA Algorithm

  • RSA algorithm theory and implementation
  • the problem of factorization

Chapter 11 – Advanced Modular Arithmetic

  • Euclidean and the greatest common divisor (GCD) problem
  • extended Euclidean algorithm (EGCD)
  • modular inverse problem

Chapter 12 – Elliptic Curve Cryptography (ECC)

  • elliptic curve cryptography theory and implementation
  • why does Bitcoin use elliptic curve cryptography?

Chapter 13 – Cryptographic Hashing

  • what is hashing in cryptography?
  • properties of hashing
  • birthday paradox
  • MD5 and SHA algorithms

Thanks for joining my course, let’s get started!

Who this course is for:

  • Python or Java developers curious about cryptography!


  • You should have an interest in cryptography as well as some programming knowledge in Python or Java!

Last Updated 10/2021

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