Cryptography Nico Döttling and Julian Loss

News

22.09.2022

Re-Exam Inspection

Dear students,

the Re-Exam inspection will take place on Thursday, 29th of September from 11am till 1 pm at CISPA0, room 0.07 (E9.1 ground floor).

Best regards

12.09.2022

Re-exam

Dear Students,

We have seated all participants in the Günter Hotz Hörsaal (AudiMo). You can find the seating plan in the materials section

The exam takes place Wed. 14.09.22 from 13:30 till 15:30 (120min). We expect to start on time so make sure to be at the... Read more

Dear Students,

We have seated all participants in the Günter Hotz Hörsaal (AudiMo). You can find the seating plan in the materials section

The exam takes place Wed. 14.09.22 from 13:30 till 15:30 (120min). We expect to start on time so make sure to be at the room at least 10 min ahead of time.
What you can and cannot bring: You are allowed 1 handwritten cheat sheet A4 front and back. No calculator is allowed.You have to bring a student ID and normal 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. Use a non-erasable black or blue pen. The exam will end at 15:30, and in the last 30 minutes (i.e. after 15:00) you will not be allowed anymore to hand in your exam early and leave.

Corona Rules:
It is strongly recommended to wear a medical face mask if you cannot maintain a safe minimum distance of 1.5 meters (i.e. when entering and leaving the exam room). When you are seated for the exam a distance of 1.5m is maintained.

What 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.

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).

If a doctor is consulted, the doctor will decide whether the patient may continue to visit Saarland University premises or whether a SARS-CoV-2 test is required. If the symptoms occur in persons who are present on Saarland University premises, the affected persons must leave the premises and contact a doctor (initially by phone).

Good luck, stay healthy, and all the Best!

16.08.2022

Exam Inspection and Re-Exam registration

Dear students,

the Exam inspection will take place on Friday, 19th of August from 2pm till 4 pm in the Cispa lecture hall (E9.1 ground floor).

Re Exam registration: For the Re-Exam please register in the CMS and LSF. The Re-Exam registration is independent... Read more

Dear students,

the Exam inspection will take place on Friday, 19th of August from 2pm till 4 pm in the Cispa lecture hall (E9.1 ground floor).

Re Exam registration: For the Re-Exam please register in the CMS and LSF. The Re-Exam registration is independent form the main exam registration.

11.08.2022

Main Exam Grades

Dear students,

the grades of the main exam are online.

We will announce the date of the exam inspection soon.

 

 

09.08.2022

Main Exam

Dear Students,

We have seated all participants in the GHH (AudiMo) or HS001 in E1.3, you will find the seat key in the materials section.

The exam takes place Thu. 11.08.22 from 13:30 till 15:30 (120min). We expect to start on time so make sure to be at the... Read more

Dear Students,

We have seated all participants in the GHH (AudiMo) or HS001 in E1.3, you will find the seat key in the materials section.

The exam takes place Thu. 11.08.22 from 13:30 till 15:30 (120min). We expect to start on time so make sure to be at the room at least 10 min ahead of time.
What you can and cannot bring: You are allowed 1 handwritten cheat sheet A4 front and back. No calculator is allowed.You have to bring a student ID and normal 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. Use a non-erasable black or blue pen. The exam will end at 15:30, and in the last 30 minutes (i.e. after 15:00) you will not be allowed anymore to hand in your exam early and leave.

Corona Rules:
It is strongly recommended to wear a medical face mask if you cannot maintain a safe minimum distance of 1.5 meters (i.e. when entering and leaving the exam room). When you are seated for the exam a distance of 1.5m is maintained.

What 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.

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).

If a doctor is consulted, the doctor will decide whether the patient may continue to visit Saarland University premises or whether a SARS-CoV-2 test is required. If the symptoms occur in persons who are present on Saarland University premises, the affected persons must leave the premises and contact a doctor (initially by phone).

Good luck, stay healthy, and all the Best!

18.07.2022

Lecture Slides and Videos from Previous Week

Dear Students,

 

I've uploaded the slides and videos from the previous week's lectures. I found and corrected some minor typos during post-editing and tried to highlight some parts a bit better on the final version of the slides. Please cross-reference the... Read more

Dear Students,

 

I've uploaded the slides and videos from the previous week's lectures. I found and corrected some minor typos during post-editing and tried to highlight some parts a bit better on the final version of the slides. Please cross-reference the lecture videos with these corrected versions and, as usual, feel free to reach out if you have any further questions.

Best,

Julian

12.07.2022

Exam Registration

Dear Students,

Please remember to register for the main exam in the LSF and CMS.

If you cannot register in the LSF please write an email to anne.mueller@cispa.de

All registrations close 2 weeks before the exam.

05.07.2022

Evaluation

Dear Students,

 

please find below the links to evaluate the lecture and its tutorial (in this order):

https://qualis.uni-saarland.de/eva/?l=136473&p=955582

https://qualis.uni-saarland.de/eva/?l=1364731&p=330379

The links will remain open until (and... Read more

Dear Students,

 

please find below the links to evaluate the lecture and its tutorial (in this order):

https://qualis.uni-saarland.de/eva/?l=136473&p=955582

https://qualis.uni-saarland.de/eva/?l=1364731&p=330379

The links will remain open until (and including) 14.7.22

24.06.2022

PKE Videos and Slides

Dear Students,

I just uploaded the slides and recorded lectures from the past two weeks. There was an issue with recording on the lecture on Tuesday last week which I noticed too late, so that recording is unfortunately not available. However, the content of that... Read more

Dear Students,

I just uploaded the slides and recorded lectures from the past two weeks. There was an issue with recording on the lecture on Tuesday last week which I noticed too late, so that recording is unfortunately not available. However, the content of that lecture is very similar to last year's lecture on public key encryption, so please watch Nico's recording of last year's lecture on the first part of PKE.

Due to a lot of spontaneous interaction with the students who attended the lecture yesterday, I was not happy with how the proof of hashed ElGamal ended up looking on my slides. Hence, I redrew the proof sketch and recorded a short video that goes through the updated proof slides in detail again.

Best,

Julian

14.06.2022

Slides for Lecture 8 completed

Dear Students,

due to popular request I have now redone the lost slides for lecture 8 which were lost due to a powerpoint accident.

09.06.2022

Updated Zoom Link

Dear Students,

As you are probably aware, there was a problem with the eduroam in HS002 on Tuesday, 7.6.22. As a result, it was not possible for me to record the lecture. Given that the eduroam is back up today, I should be able to record the lecture as... Read more

Dear Students,

As you are probably aware, there was a problem with the eduroam in HS002 on Tuesday, 7.6.22. As a result, it was not possible for me to record the lecture. Given that the eduroam is back up today, I should be able to record the lecture as usual.

*Please also note that I have updated the zoom link for the lecture in the description for the remainder of the term*.

Best, Julian

 

 

30.05.2022

No Lecture tomorrow (31.05.22)

Dear Students,

due to an appointment collision there will be no lecture tomorrow. The lecture on Thursday (02.06.22) will be on zoom only.

 

24.05.2022

Slightly late for lecture

Due to traffic, I will be 5 to 10 minutes late for the lecture 

24.05.2022

Slightly late for lecture

Due to traffic, I will be 5 to 10 minutes late for the lecture 

18.05.2022

Quick Announcement

For those interested, our CISPA distinguished lecture will start in a few moments, invitation below:

As part of CISPA’s Distinguished Lecture Series, we are happy to
announce that Huijia (Rachel) Lin (University of Washington) will give a talk on

How to Hide... Read more

For those interested, our CISPA distinguished lecture will start in a few moments, invitation below:

As part of CISPA’s Distinguished Lecture Series, we are happy to
announce that Huijia (Rachel) Lin (University of Washington) will give a talk on

How to Hide Secrets in Software? 

on Wed, May 18, 2022, at 17:00am via Zoom on
https://cispa-de.zoom.us/j/93997221436?pwd=QlRzT3RPS2ZKM1BSRVEvc2xoV2R1dz09


Abstract:
At least since the initial public proposal of public-key cryptography based on computational hardness assumptions (Diffie and Hellman, 1976), cryptographers have contemplated the possibility of a “one-way compiler” that translates computer programs into “incomprehensible” ones that compute the same function. In this talk, we will describe a mathematical formalization of this goal known as  indistinguishability obfuscation (iO). Over the past decade, It has been demonstrated that iO is a fascinating and powerful tool that enables a host of new cryptographic goals and beyond. We then show how to construct iO based on three well-studied hardness assumptions.
Joint work with Aayush Jain at CMU and Amit Sahai at UCLA. 


Bio:
Huijia (Rachel) Lin is an Associate Professor in the Paul G. Allen School of Computer Science and Engineering at the University of Washington, where she co-leads the Cryptography Lab. Before joining the University of Washington, she was an Assistant Professor in the Department of Computer Science at the University of California, Santa Barbara. Earlier, she obtained a PhD in Computer Science from Cornell University, and was a post-doctoral researcher at MIT Computer Science and Artificial Intelligence Laboratory (CSAIL) and Department of Computer Science at Boston University. Her research interests are in Cryptography, and its interplay with theory of computer science and security. She is a recipient of a US National Science Foundation CAREER award, a Hellman Fellowship, a best paper award honorable mention at Eurocrypt 2016, and best paper awards at Eurocrypt 2018 and STOC 2021.


Best regards,
Nico Döttling
 

17.05.2022

Exam Dates

Dear Students,

the exam dates are:

  • Main Exam: Thu. 11.08.22  13:30
  • Re-Exam: Wed. 14.09.22 13:30
11.05.2022

Lecture tomorrow virtual only

Dear Students,

the lecture tomorrow the 12.05 will be virtual only on the usual zoom room.

10.05.2022

Lecture starts later today

Dear students,

Today's (10.05) lecture will start 15 minutes later, at 12:45. We will omit the mid-lecture 5minute break.

26.04.2022

Discord Server

Dear students,

we now have a discord server:

Join Crypto'22

Here you can ask questions to the tutors and let them know what you want to see in the tutorials.

20.04.2022

Online Tutorial Link

Dear students,

the link for the online tutorial can be found in the materials section. Note that the link itself might change but you can always find the newest link in the materials section.

14.04.2022

Tutorial registration

Dear students,

you can select your preferences for the tutorial slots now. The Wednesday 14:15 Tutorial is online and the rest of the tutorials are in person.

Show all
 

 

Cryptography

Lecture Period

The first lecture will be on Thursday 14.04.2022, the lecture will end Friday 21.07.2022.

Course Overview

Instructors: Nico Döttling and Julian Loss

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. Basic Cryptanalysis
  3. Practical Aspects of Cryptography

Lecture Times and Place

The lecture will take place in the auditorium HS002 this year and at the following dates:

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

For your convenience, we will make the recordings of last iterations of lecture available in the materials section. Be aware though that several topics may change this year.

Tutorials

Dates of the tutorials will be announced here.

Exercise Sheets

The will be a weekly exercise sheet which you can hand to qualify for the exams. If you score 40% of the achievable points across all exercise sheets you will qualify for the exams.

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

  • Main Exam: Thu. 11.08.22  13:30
  • Re-Exam: Wed. 14.09.22 13:30


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