Cryptography Nico Döttling, Antoine Joux, Cas Cremers

News

13.09.2021

Re-Exam Inspection

Dear Students,

If you have registered for the re-exam inspection, please be tomorrow, Tuesday 14.09.21, at 10:30 at the CISPA lecture hall. There are no specific time slots. If there is no more demand, we will leave at 11:00.

06.09.2021

Re-Exam Inspection

Dear Students,

the re-exam inspection will be next Tuesday starting 10:30. If you want to inspect your exam, you need to register for the Re-Exam inspection here in the CMS until Sunday 12.09.21. We will assign time slots the day after.

06.09.2021

Re-Exam Results

Dear Students,

the re-exam has been graded and you will find your exam grade (not final grade) on your CMS page. We will shortly announce the date of the re-exam inspection.

03.09.2021

Re-Exam next Monday (06.09.21)

Dear Students,

the registration period for the re-exam is over and we have seated all participants in the GHH (AudiMo), you will find the seat key in the materials section.

The exam is next Monday 06.09.21, from 10:00 to 12:00. We expect to start on time so... Read more

Dear Students,

the registration period for the re-exam is over and we have seated all participants in the GHH (AudiMo), you will find the seat key in the materials section.

The exam is next Monday 06.09.21, from 10:00 to 12:00. We expect to start on time so make sure to be at the GGH at least 10 min ahead of time. The same modalities as for the main exam apply: in addition to the exam packing list (1 cheat sheet A4 front and back, non-programmable calculator, student ID and ID), please mind that you are not allowed to use any additional materials, in particular smart phones. The only exception from this are English dictionaries. You are allowed to answer the exam questions in either German or English. The exam will end at 12:00, and in the last 30 minutes (i.e. after 11:30) you will not be allowed anymore to hand in your exam early and leave.

Also mind that the same corona rules apply as for the main-exam:

Read the following points carefully, taken from the university's corona FAQ (https://www.uni-saarland.de/en/page/coronavirus/faq.html)

  1. Medical Face Masks
    It is compulsory to wear medical face masks when moving around within buildings - except when a justified medical certificate is presented. It is thus absolutely necessary for you to bring your own protection mask with you.
  2. What do you have to consider if you have flu-like symptoms?

    In light of the current infection rates in Saarland, persons who have not recently come into contact with someone with a known or suspected SARS-CoV-2 infection and who are showing only mild signs of illness (e.g. a runny nose and feeling only mildly incapacitated) may visit Saarland University sites. The same applies to people who have a known history of exhibiting similar symptoms due to a pre-existing condition, such as hay fever or a pollen allergy. Please refer to the check list for flu-like symptoms

    If, however, a person is feeling seriously unwell, particularly if they are displaying respiratory and/or flu symptoms or other symptoms relevant to COVID-19, they must stay at home and, when necessary, consult a doctor (initially by phone).

  3. Do you have to get tested?
    We strongly advise you to participate in in-person meetings/events with the participants physically present on site only if you have tested negative for the coronavirus (Note: The test result may not be older than 24 hours). An exception to this is participation in face-to-face classes, including (block) seminars and exams, here only people who are tested twice a week should participate. If a person has not been tested, this may not lead to their exclusion from the in-person meeting/event. Testing is subject to Section 5a of the Ordinance on Combating the Coronavirus Pandemic (VO-CP of 7 July 2021). The test result is to be certified by the body carrying out the test.

 

Good luck, stay healthy, and all the Best!

20.08.2021

Re-Exam Registration open

The re-exam will be on the 06.09.21. You can register until the 02.09.21

17.08.2021

Exam Inspection Location

The Exam Inspection will take place in the CISPA lecture hall.

17.08.2021

Exam Inspection Slots

Dear Students,

The exam inspection will be tomorrow (18.08.21) from 13:00 - 15:00, please mind that due to corona restrictions you will not be allowed to attend if you did not register. You will be in one of two groups, depending on the first letter of your last... Read more

Dear Students,

The exam inspection will be tomorrow (18.08.21) from 13:00 - 15:00, please mind that due to corona restrictions you will not be allowed to attend if you did not register. You will be in one of two groups, depending on the first letter of your last name.

  1. Last name starting with A - M is assigned the time slot from 13:00 - 14:00
  2. Last name starting with R - Z is assigned the time slot from 14:00 - 15:00

Please be there in time for your slot. Thanks for your cooperation!

12.08.2021

Main Exam Inspection

The main exam inspection will be on Wednesday the 18.08.21 in the CISPA lecture hall. You will need to register for the exam inspection due to corona policies. You will be assigned a time-slot the day before.

11.08.2021

Grading finished

Dear Students,

we have finished the grading of the exam and you should have received an email with your results. Please mind that the grade of the exam is not the your final grade of the course, which will also take into account the grade bonus you may have... Read more

Dear Students,

we have finished the grading of the exam and you should have received an email with your results. Please mind that the grade of the exam is not the your final grade of the course, which will also take into account the grade bonus you may have earned in the quizzes.

We will soon announce a date for the exam inspection.

09.08.2021

Exam Correction

Dear Students,

as our tutors are writing exams themselves, the exam corrections have been delayed. The results of the exam are not to be expected before the evening of Wednesday 11.08.

Thanks for your patience!

04.08.2021

Exam Modalities

Dear Students,

in addition to the exam packing list (1 cheat sheet A4 front and back, non-programmable calculator, student ID and ID), please mind that you are not allowed to use any additional materials, in particular smart phones. The only exception from this... Read more

Dear Students,

in addition to the exam packing list (1 cheat sheet A4 front and back, non-programmable calculator, student ID and ID), please mind that you are not allowed to use any additional materials, in particular smart phones. The only exception from this are English dictionaries. You are allowed to answer the exam questions in either German or English.

The exam will start at 10:00 straight, so make sure to be at the lecture hall you were assigned to no later than 9:45. If you arrive late you will risk not being seated and missing the exam. The exam will end at 12:00, and in the last 30 minutes (i.e. after 11:30) you will not be allowed anymore to hand in your exam early and leave.

Good Luck!

04.08.2021

Exam Seating Plan Online

Dear students,

you will find the seating plans for the exam in the materials section of the CMS under Exam Seating Plans. The file seatkey tells you in which lecture hall (GHH or HS001) you are by your matriculation number.

03.08.2021

Exam Packing List

Dear all,

please remember that apart from your own pens, you may bring two pages of notes - that is ONE sheet front and back - but no other paper of your own.
You are also allowed a non-programmable(!) standard calculator.

Please also remember to bring your... Read more

Dear all,

please remember that apart from your own pens, you may bring two pages of notes - that is ONE sheet front and back - but no other paper of your own.
You are also allowed a non-programmable(!) standard calculator.

Please also remember to bring your ID and student ID!

03.08.2021

Final Day for CMS Exam Registration

Dear Students,

If you haven't yet signed up for the main exam on CMS but would like to attend, please sign up now. You have until tonight at 23:59. Tomorrow morning we will make the lecture hall seating assignments, after which it is generally not possible to... Read more

Dear Students,

If you haven't yet signed up for the main exam on CMS but would like to attend, please sign up now. You have until tonight at 23:59. Tomorrow morning we will make the lecture hall seating assignments, after which it is generally not possible to seat students who are not registered (due to the strict corona regulations). Thanks for your understanding!

03.08.2021

Corona Regulations during the Exam

Dear Students,

now that the registration for the exam is closed and the exam itself just 3 days away, it is time to remind you of the corona specific regulations. Thus read the following points carefully, taken from the university's corona FAQ (... Read more

Dear Students,

now that the registration for the exam is closed and the exam itself just 3 days away, it is time to remind you of the corona specific regulations. Thus read the following points carefully, taken from the university's corona FAQ (https://www.uni-saarland.de/en/page/coronavirus/faq.html)

  1. Medical Face Masks
    It is compulsory to wear medical face masks when moving around within buildings - except when a justified medical certificate is presented. It is thus absolutely necessary for you to bring your own protection mask with you.
  2. What do you have to consider if you have flu-like symptoms?

    In light of the current infection rates in Saarland, persons who have not recently come into contact with someone with a known or suspected SARS-CoV-2 infection and who are showing only mild signs of illness (e.g. a runny nose and feeling only mildly incapacitated) may visit Saarland University sites. The same applies to people who have a known history of exhibiting similar symptoms due to a pre-existing condition, such as hay fever or a pollen allergy. Please refer to the check list for flu-like symptoms

    If, however, a person is feeling seriously unwell, particularly if they are displaying respiratory and/or flu symptoms or other symptoms relevant to COVID-19, they must stay at home and, when necessary, consult a doctor (initially by phone).

  3. Do you have to get tested?
    We strongly advise you to participate in in-person meetings/events with the participants physically present on site only if you have tested negative for the coronavirus (Note: The test result may not be older than 24 hours). An exception to this is participation in face-to-face classes, including (block) seminars and exams, here only people who are tested twice a week should participate. If a person has not been tested, this may not lead to their exclusion from the in-person meeting/event. Testing is subject to Section 5a of the Ordinance on Combating the Coronavirus Pandemic (VO-CP of 7 July 2021). The test result is to be certified by the body carrying out the test.

    (I.e. the university cannot force you to get tested; however, if you are not vaccinated, please be mindful of your fellow men and get tested no more than 3 days before...)

02.08.2021

Exam Prep Offers

Dear students,

Tomorrow there will be the full exam prep package for you! In the tutorial slot at 10:00 you will have the opportunity to discuss questions with our tutors - this might be the best spot for individual questions on some topics and exercises.
Later... Read more

Dear students,

Tomorrow there will be the full exam prep package for you! In the tutorial slot at 10:00 you will have the opportunity to discuss questions with our tutors - this might be the best spot for individual questions on some topics and exercises.
Later at 12:30 in the regular exam slot, there will be a Q&A Session with your professor - This might be the best spot for any questions that remain open and that might be interesting to a broader audience :)

I hope you are having a good exam prep time and will see you on Friday. An anouncement on exam modalities will follow tomorrow.

Best,
Stella

26.07.2021

Bonus points for quizzes added

Dear all,

you might remember there were some bonus points after removing exercise 3 from Quiz 6 - I have added these points to the score of the students where it made a difference for them getting the exam bonus :)

26.07.2021

Final Scores of the Quizzes posted

Dear students,

you will find the final scores of the quizzes on your CMS page. You qualify for the exam with a score of at least 41 points, and you will get an exam bonus of 0,3 with a score of at least 77.

23.07.2021

No Exercise Sheet

There will be no exercise sheet today.

16.07.2021

CMS Exam Registration Open

Dear Students,

The exam registration on the CMS is now open. You will be able to register if you achieved at least 40% of the achievable points in the quizzes (1 quiz remaining). Don't forget to also register on the LSF!

Registration will close 02.08.21, make... Read more

Dear Students,

The exam registration on the CMS is now open. You will be able to register if you achieved at least 40% of the achievable points in the quizzes (1 quiz remaining). Don't forget to also register on the LSF!

Registration will close 02.08.21, make sure to register until then. Timely registration in the CMS is especially important this year due to strict hygiene rules.

Thanks!

15.07.2021

Q&A Session before exam

Dear students,

there will be a Q&A session on 03.08.21 at 12:30 in the usual lecture zoom room

 

21.06.2021

Lecture slightly earlier this Tuesday

Dear students,

the lecture on Tuesday, 22.07.21 will start at 12:00 and end at 13:15.

18.06.2021

Quiz + Exercise Sheet 8

On Quiz 6 there was an issue with Question 3 as brought up on the Discord. We have removed the points from this exercise and your achieved points will be attributed as bonus points. We've had some issues doing this technically on moodle, so expect the points to... Read more

On Quiz 6 there was an issue with Question 3 as brought up on the Discord. We have removed the points from this exercise and your achieved points will be attributed as bonus points. We've had some issues doing this technically on moodle, so expect the points to either show up there next week or we will count it towards your total in the end of the semester.

The new exercise sheet will include an old exam question again, as you seemed to like that :) It also taps into MACs with one question. While the definitions you've learned are enough, in case of uncertainty it might help to wait for the Tuesday lecture for more examples of usage.

I wish you a sunny weekend,
Stella

10.06.2021

Exam Question on current sheet + Quiz

Dear Students,

the number of hand-ins this week is rather low, so I'm bringing to your attention that we put a modified old exam question on the sheet, you may want to give that one a shot, if you do any task at all this week :)

Also we had to again change the... Read more

Dear Students,

the number of hand-ins this week is rather low, so I'm bringing to your attention that we put a modified old exam question on the sheet, you may want to give that one a shot, if you do any task at all this week :)

Also we had to again change the grading of our quiz. The correct answer to question 5 would have been sqrt(2^n), which I put in as sqrt(n) as a typo, so we took this question out of grading as the "correct" answer is quite ambiguous. Sorry for the inconvenience.

For the definition of collissions in the exam please note, that we consider /sets/ that is if the unordered pair (w,x) is a collission i.e. H(w)=H(x), then H(x)=H(w) too, but (x,w) counts as the same collisison as (w,x) in our books. Because that wasn't super clear prior to the test, we have accepted answers that took this as two different collisions this time!

11.05.2021

place for socializing

Dear students,

after the lecture a student asked for a way to get to know other students with whom to e.g. work on exercise sheets. One place is of course our very own discord server during the office hours, but the Fachschaft Information also offers a discord... Read more

Dear students,

after the lecture a student asked for a way to get to know other students with whom to e.g. work on exercise sheets. One place is of course our very own discord server during the office hours, but the Fachschaft Information also offers a discord server where you can meet other students and exchange thoughts: https://discord.link/InofficialUdS

11.05.2021

Change to Exercice 2.2

We have changed the exercice reflecting a question on the askbot.

If you have worked under the old version and assumed e.g. that the second die in the magicians experiment had numbers 0-9 or it has numbers 1-10 and you took it mod 10, feel free to leave your... Read more

We have changed the exercice reflecting a question on the askbot.

If you have worked under the old version and assumed e.g. that the second die in the magicians experiment had numbers 0-9 or it has numbers 1-10 and you took it mod 10, feel free to leave your solution as it is. We mainly want to see you working with the probabilities :)

06.05.2021

Quiz Update

Dear students,

there seems to have been a problem with the automated correction solutions.
We have changed it up and apart from question 1 which we will later correct manually, the points should now be assigned correctly.

Thanks for bringing this to our... Read more

Dear students,

there seems to have been a problem with the automated correction solutions.
We have changed it up and apart from question 1 which we will later correct manually, the points should now be assigned correctly.

Thanks for bringing this to our attention,
Stella Wohnig

06.05.2021

No Lecture Thursday 13.05

Since Thursday 13.05.21 is a public holiday, there will be no lecture and no quiz.

29.04.2021

C Code for Enigma

As per popular request, we are providing the C code from the enigma lecture in the materials section (under Misc)

29.04.2021

Posting of lecture videos

Dear students,

some of the lecture videos we post need to be edited first, which can cause a few days of delay. We always try to post the videos as soon as possible.

Thanks for your patience! 

22.04.2021

Moodle for the course

In order to participate in the quizzes and qualify for the exam, please sign up on our Moodle https://lms.sulb.uni-saarland.de/moodle/course/view.php?id=5460

20.04.2021

Sample Quiz Question

Here's a sample question that you could expect in the quizzes: https://www.menti.com/mqqwzocoff

19.04.2021

Link to Lecture

Dear Students,

you will find the zoom link to the lecture in the materials section in the category zoom links or here:

https://cispa-de.zoom.us/j/92826956399?pwd=MHhOOFk5Vzh6akZiQnVCZGFWT3E1Zz09

See you tomorrow!

Show all
 

 

Cryptography

Lecture Period

The lecture period will start Monday 19.04.2021 and end Friday 23.07.2021.

Course Overview

Instructors: Nico Döttling, Antoine Joux and Cas Cremers

This lecture will provide an introduction to the field of cryptography. Modern cryptography is the study of the design and analysis of systems with a guaranteed resilience against adversarial abuse. During the run of the course, we will cover the following topics:

  1. Basic Concepts of Modern Cryptography
  2. Cryptanalysis
  3. Practical Aspects of Cryptography

Online Lecture

The lecture will again be online this year. The lectures will be online and live at the following dates:

  • Tuesday 12:30 - 14:00
  • Thursday 12:30 - 14:00

The lectures will be recorded and will be made available online. For your convenience, we have made the recordings of last year's lecture available in the materials section. Be aware though that several topics will change this year.

Office Hours

We have office hour style tutorials on discord at the following dates:

  • Tuesday 10:00 - 12:00
  • Friday 10:00 - 12:00

Exercise Sheets

The will be a weekly (non-mandatory) exercise sheet which you can hand in to get feedback

Exam Qualification

Every week there will be a short quiz on the end of each Thursday lecture (starting 29.04).

  • If you score 40% of the achievable points across all quizzes you will qualify for the exam
  • If you score 75% of the achievable points across all quizzes you will get an exam grade bonus of 0,3 (conditioned that you pass the exam)

Literature

You can find complementary literature in the Semesterapparat.

Exams

The exams will be in person and on site. The dates for the exams are as follows

  • Main Exam: 06.08.21, 10:00-12:00
  • Re-Exam: 06.09.21, 10:00-12:00

Exam Inspection

  • Main Exam Inspection: Wednesday, 18.08.21, CISPA Lecture Hall. Last name A - M: 13:00-14:00, Last name R - Z 14:00-15:00
  • Re-Exam Inspection: Tuesday, 14.09.21, CISPA Lecture Hall. 10:30


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