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Cryptographic Protocols: The Peruvian Coin Flip


Source Institutions

    Computer Science Unplugged

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Cryptographic Protocols: The Peruvian Coin Flip

This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people who don’t necessarily trust each other, and who are connected only by a telephone. Use this activity to introduce learners to cryptographic protocols and internet security/privacy issues. Variations, extensions, background information, and further reading suggestions are included in the PDF.

Quick Guide


Preparation Time:
Under 5 minutes

Learning Time:
30 to 45 minutes

Estimated Materials Cost:
$1 - $5 per group of students

Age Range:
Ages 8 - 18

Resource Types:
Activity, Lesson/Lesson Plan, Simulation

Language:
English

Materials List (per group of students)


Subjects


  • Engineering and Technology
    • Computing
      • Computer Science
      • Information Systems
      • Information Technology
    • Engineering
      • Computer Engineering
    • Technology
      • Information and Communication
  • Mathematics
    • Data Analysis and Probability
      • Data Analysis
      • Data Collection
      • Data Representation
      • Probability
    • Number and Operations
    • Problem Solving
    • Reasoning and Proof
    • Representation
  • The Nature of Science
    • Science and Society
      • Risks and Benefits
      • Ethics
  • The Nature of Technology
    • Technology and Society
      • Impacts of Technology

Informal Categories


  • Computers
  • Sports and Exercise

Audience


To use this activity, learners need to:

  • see
  • see color
  • read
  • touch

Learning styles supported:

  • Involves teamwork and communication skills
  • Uses STEM to solve real-world problems
  • Involves hands-on or lab activities

Other


Components that are part of this resource:

Includes alignment to state and/or national standards

This resource is part of:

Access Rights:

  • Free access

By:

  • Bell, Tim; Witten, Ian; Fellows, Mike

Rights:

Funding Sources:

  • Brian Mason Scientific and Technical Trust
  • Google Inc.

Related Video:

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