• Offered by Department of Mathematics
• ANU College ANU Joint Colleges of Science
• Course subject Mathematics
• Areas of interest Mathematics
• Course convener
• Timothy Trudgian
• Mode of delivery In Person
• Offered in Second Semester 2014
Number Theory and Cryptography (MATH3301)

The need to protect information being transmitted electronically (such as the widespread use of electronic payment) has transformed the importance of cryptography. Most of the modern types of cryptosystems rely on (increasingly more sophisticated) number theory for their theoretical background. This course introduces elementary number theory, with an emphasis on those parts that have applications to cryptography, and shows how the theory can be applied to cryptography.
Number theory topics will be chosen from: the Euclidean algorithm, highest common factor, prime numbers, prime factorisation, primality testing, congruences, the Chinese remainder theorem, diophantine equations, sums of squares, Euler's function, Fermat's little theorem, quadratic residues, quadratic reciprocity, Pell's equation, continued fractions.

Cryptography topics will be chosen from: symmetric key cryptosystems, including classical examples and a brief discussion of modern systems such as DES and AES, public key systems such as RSA and discrete logarithm systems, cryptanalysis (code breaking) using some of the number theory developed.

Honours Pathway Option (HPO):

Students who take the HPO will complete extra work of a more theoretical nature. The assignments will be replaced by alternative assignments and the final exam will contain alternative questions requiring deeper conceptual understanding.

## Learning Outcomes

Upon successful completion, students will have the knowledge and skills to:

On satisfying the requirements of this course, students will have the knowledge and skills to:

1. Solve problems in elementary number theory
2. Apply elementary number theory to cryptography
3. (HPO only) Develop a deeper conceptual understanding of the theoretical basis of number theory and cryptography

## Indicative Assessment

Assessment will be based on:

• Three assignments (10%; LO 1, 2, & 3 for HPO)
• Final examination (70%; LO 1, 2, & 3 for HPO)

The ANU uses Turnitin to enhance student citation and referencing techniques, and to assess assignment submissions as a component of the University's approach to managing Academic Integrity. While the use of Turnitin is not mandatory, the ANU highly recommends Turnitin is used by both teaching staff and students. For additional information regarding Turnitin please visit the ANU Online website.

36 lectures and 10 tutorials

## Requisite and Incompatibility

To enrol in this course you must have successfully completed either MATH2016, MATH2302, MATH2303, MATH2301, MATH1116, MATH1014 with a mark of 60 and above. You are not able to enrol in this course if you have previously completed MATH3001.

## Fees

Tuition fees are for the academic year indicated at the top of the page.

If you are a domestic graduate coursework or international student you will be required to pay tuition fees. Students continuing in their current program of study will have their tuition fees indexed annually from the year in which you commenced your program. Further information for domestic and international students about tuition and other fees can be found at Fees.

Student Contribution Band:
2
Unit value:
6 units

If you are an undergraduate student and have been offered a Commonwealth supported place, your fees are set by the Australian Government for each course. At ANU 1 EFTSL is 48 units (normally 8 x 6-unit courses). You can find your student contribution amount for each course at Fees.  Where there is a unit range displayed for this course, not all unit options below may be available.

Units EFTSL
6.00 0.12500

## Course fees

Domestic fee paying students
Year Fee
1994-2003 \$1650
2004 \$1926
2005 \$2298
2006 \$2520
2007 \$2520
2008 \$2916
2009 \$2916
2010 \$2916
2011 \$2946
2012 \$2946
2013 \$2946
2014 \$2946
International fee paying students
Year Fee
1994-2003 \$3390
2004 \$3450
2005 \$3450
2006 \$3618
2007 \$3618
2008 \$3618
2009 \$3618
2010 \$3750
2011 \$3756
2012 \$3756
2013 \$3756
2014 \$3762
Note: Please note that fee information is for current year only.

## Offerings, Dates and Class Summary Links

The list of offerings for future years is indicative only.
Class summaries, if available, can be accessed by clicking on the View link for the relevant class number.

### Second Semester

Class number Class start date Last day to enrol Census date Class end date Mode Of Delivery Class Summary
7321 21 Jul 2014 01 Aug 2014 31 Aug 2014 30 Oct 2014 In Person N/A