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Understanding Cryptography and Its Role in Digital Communications

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Understanding Cryptography and Its Role in Digital Communications
  • Description
  • Outcome
  • Certification
  • Cryptography plays a vital role in modern digital communication systems. Cryptographic methods allow the encryption and decryption of messages sent across digital communication networks. In this free online course the learner is first introduced to ancient ciphers and how they were used. The vital role of randomness in cryptographic methods is then explained and the learner is taken through step-by-step examples. The role of key scientists such as John von Neuman is also explained. This course will be of great interest to all learners who would like to learn more about cryptography and the vital role it plays in today's digital communication networks.

  • Having completed this course learners will be able to:
    - Describe the use of ciphers;
    - Explain the role of randomness in encryption;
    - Explain the development of RSA encryption

  • All Alison courses are free to study. To successfully complete a course you must score 80% or higher in each course assessments. Upon successful completion of a course, you can choose to make your achievement formal by purchasing an official Alison Diploma, Certificate or PDF.

    Having an official Alison document is a great way to share your success. Plus it’s:

    • Ideal for including in CVs, job applications and portfolios
    • An indication of your ability to learn and achieve high results
    • An incentive to continue to empower yourself through learning
    • A tangible way of supporting the Alison mission to empower people everywhere through education.

Modules List( 2 )
  • Module 1: Introduction to Cryptography
    • Cryptography - Learning Outcomes
    • Introduction to Cryptography
    • Probability Space
    • Caesar Cipher
    • Polyalphabetic Cipher
    • One-time Pad
    • Frequency Stability
    • WW2 Enigma Machine
    • Claude Shannon's Perfect Secrecy
    • Random vs. Pseudorandom Number Generators
    • The Fundamental Theorem of Arithmetic
    • Diffie-Hellman Key Exchange - Part 1
    • Discrete Logarithm Problem
    • Diffie-Hellman Key Exchange - Part 2
    • Introduction to RSA Encryption
    • RSA Encryption - Part 2
    • RSA Encryption - Part 3
    • Euler's Totient Phi Function
    • RSA Encryption - Part 4
    • Lesson Summary
  • Module 2: Introduction to Cryptography Assessment
    • Introduction to Cryptography Assessment
Topics List ( 1 )
Module 2: Introduction to Cryptography Assessment
You must score 80% or more to pass this assessment.
Course Features
  • Duration

    1-2 Hours

  • Publisher

    Khan Academy

  • Video


  • Audio


  • Assessment


  • Certification


  • Price


  • Reward

    50 Pts

  • Responsive


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