## CMSC/Math 456, Cryptology, Fall 2008, TuTh
9:30-10:45AM

**Instructor:**
Aravind
Srinivasan

**Office:** AVW 3227, **Phone:** 301-405-2695

**Instructor's office Hours:** Thu 2-3 and Fri 12-1 in AVW 3227

**TA**: Barna Saha (barna AT cs.umd.edu),
Office Hours Mon, Wed 4-5 PM, in AVW 1112

**Course Time and Location:** Tue,Thu 9:30-10:45 AM, CSI 2117

**Book:**
Introduction to Modern Cryptography,
**First Edition** (ISBN: 0-13-186239-1)
by Jonathan Katz and Yehuda Lindell

**Course Webpage:**
http://www.cs.umd.edu/class/fall2008/cmsc456/index.html
**Course Description:**

Cryptology is the study of the design and analysis of various
encryption schemes, and related topics. The plan is to study the
basics of the subject and then touch on several recent developments.

**Grading:** Homework 30%, Midterm: 30%, Final: 40%.
Homework should be stapled and submitted on time; late homework will *not*
be accepted. Your lowest homework score will be dropped. Graduate students
will be given additional problems in the homeworks and exams.

**Approximate syllabus**
The following is a *tentative* syllabus.
Chapter numbers refer to the table of contents available here.

- Classical vs. modern cryptography; some historical ciphers; principles of modern cryptography.
(Chapter 1.)
- Perfectly-secret encryption. (Chapter 2.)
- Computational security. Symmetric-key encryption. (Chapter 3.)
- Message authentication and hash functions. (Chapter 4.)
- Block ciphers. (Chapter 5.)
- Theoretical constructions. (Sections 6.1, 6.2.)
- Number theory; cryptographic hardness assumptions and their applications. (Chapter 7.)
- The public-key revolution; Diffie-Hellman key exchange. (Chapter 9.)
- Public-key encryption. (Chapter 10.)
- Digital signatures. (Chapter 12.)
- The random oracle model and efficient cryptographic schemes. (Chapter 13.)
- As time permits, we will cover some advanced topics.

### Homework

All homework is due at the beginning of class on the due date.
Homework 1, due September 16th.

Homework 2, due September 25th.

Homework 3, due October 7th. (Exercise 3.17 has been removed from
HW3, and appears instead in HW4.)

Homework 4, due October 14th.

Homework 5, due November 4th.

Homework 6, due November 13th.

Homework 7, due December 2nd.

Homework 8, due December 11th.

### Mid-Term and Final Exam

The mid-term and final exam will be closed-book and closed-notes;
calculators and
other computing equipment will **not** be permitted.

The final exam is scheduled by the University to be on
Tuesday, December 16, 2008, from 8-10 AM in the classroom.
The mid-term will be in class at the usual class time (9:30 - 10:45 AM),
on Thursday, October 16, 2008.

### Course Evaluation

Students are strongly encouraged to complete their course evaluations;
the site is here, and
will be open in the first half of December.
### Excused Absences

Students claiming a excused absence must apply in writing and furnish
documentary support (such as from a health-care professional who treated
the student) for any assertion that the absence qualifies as an excused
absence. The support should explicitly indicate the dates or times the
student was incapacitated due to illness. Self-documentation of illness
is not itself sufficient support to excuse the absence. An instructor
is not under obligation to offer a substitute assignment or to give a
student a make-up assessment unless the failure to perform was due to
an excused absence.
### Academic Accommodations for Disabilities

Any student eligible for and requesting reasonable academic accommodations
due to a disability is requested to provide, to the instructor in office
hours, a letter of accommodation from the Office of Disability Support
Services (DSS) within the first two weeks of the semester.
### Academic Integrity

The University of Maryland, College Park has a nationally recognized
Code of Academic Integrity, administered by the Student Honor Council.
This Code sets standards for academic integrity at Maryland for all
undergraduate and graduate students. As a student you are responsible
for upholding these standards for this course. It is very important for
you to be aware of the consequences of cheating, fabrication,
facilitation, and plagiarism. For more information on the Code of
Academic Integrity or the Student Honor Council, please visit
http://www.shc.umd.edu.

To further exhibit your commitment to academic integrity, remember to
sign the Honor Pledge on all examinations and assignments: "I pledge on
my honor that I have not given or received any unauthorized assistance
on this examination (assignment)."
### Some Cryptology Links

Quadralay Cryptography Archive
This page is a very useful list of things associated with cryptography.
The National Security Agency