# COMP61411 Cryptography syllabus 2020-2021

COMP61411 materials

COMP61411 Cryptography

Level 6
Credits: 15
Enrolled students: 51

Assessment methods

• 50% Written exam
• 50% Coursework
Timetable
SemesterEventLocationDayTimeGroup
Sem 1 P1 ONLINE LabORATORY Mon 10:00 - 11:00 -
Sem 1 P1 ONLINE DROP-IN Mon 12:00 - 13:00 -
Sem 1 P1 INDEPENDENT STUDY Mon 13:00 - 15:00 -
Sem 1 P1 ONLINE LabORATORY Mon 16:00 - 17:00 -
Themes to which this unit belongs
• Cyber Security

## Overview

This course unit detail provides the framework for delivery in 20/21 and may be subject to change due to any additional Covid-19 impact. Current students should see Blackboard/course unit related emails for any further updates.

Cryptographic techniques today lie at the heart of the strategies used to protect users' data from unauthorised access. They come into their own particularly when data has to be transmitted across unreliable and unprotected networks.

## Aims

The course aims to give students a good appreciation of cryptographic techniques, as they have arisen historically, and as they are used today.

## Syllabus

• Early cryptography: permutations and substitutions, Vignere, Vernam, one time pads, etc.
• Rotor machines: Enigma and its relatives.
• Case study: Marian Rejewski and the breaking of the German Enigma.
• Modern cryptography, secret key: block cyphers, DES, AES, etc.
• Modern cryptography, public key: Diffie-Hellman, RSA, elliptic curves.
• Message authentication, hash functions.
• Quantum cryptography: quantum key distribution in practice.

## Feedback methods

Feedback is provided face to face in the lab, and online for uploaded assessed materials.

## Study hours

• Assessment written exam (2 hours)
• Lectures (20 hours)
• Practical classes & workshops (15 hours)

## Employability skills

• Analytical skills
• Problem solving

## Learning outcomes

On successful completion of this unit, a student will be able to:

• Comment on the broad principles underlying cryptography and its applications.
• Describe some of the classical cryptographic techniques and their weaknesses.
• Describe the principles of the most widely used private key cryptographic schemes.
• Describe the principles of the most widely used public key key cryptographic schemes.