Die Suche ergab 26 Treffer

von mischnei
2. Mär 2009 12:59
Forum: Archiv
Thema: Übung 2, Task 4 bzw. Winternitz OTS
Antworten: 8
Zugriffe: 802

Re: Übung 2, Task 4 bzw. Winternitz OTS

Hey,

The notation of the PQC-book differs a bit from the exercise, I'm gonna correct the exercise.

In the exercise it is H = f, where the output of H should have 3 bits. The message digest lenght (which is the output length of g) is 15 bit.

Greetz

Michael
von mischnei
26. Feb 2009 14:49
Forum: Archiv
Thema: Übung 2, Task 4 bzw. Winternitz OTS
Antworten: 8
Zugriffe: 802

Re: Übung 2, Task 4 bzw. Winternitz OTS

Hi,

you don't need that message m'; depends on your attacker model...

Greetz

Michael
von mischnei
25. Feb 2009 18:46
Forum: Archiv
Thema: gamma-SVP und gamma-HSVP
Antworten: 1
Zugriffe: 565

Re: gamma-SVP und gamma-HSVP

Hey, the direction mentioned in the lecture is much harder to prove; you have to use the gamme-HSVP-solver linear many times to solve the SVP with approximation factor gamma^2. Lovasz showed this reduction in 1986 in a paper called "An algorithmic theory of numbers, graphs, and complexity". But it i...
von mischnei
24. Feb 2009 16:53
Forum: Archiv
Thema: Übung 2, Task 4 bzw. Winternitz OTS
Antworten: 8
Zugriffe: 802

Re: Übung 2, Task 4 bzw. Winternitz OTS

Hey,

when hashing parts of the signature again you can create a new signature that will be truely accepted... Does the solution of Ex1 Task 7c not help you?

nice day

michael
von mischnei
17. Feb 2009 17:19
Forum: Archiv
Thema: Fourth exercise
Antworten: 5
Zugriffe: 771

Re: Fourth exercise

Hey,

we've updated the last exercise sheet; the solution is also available. In order to prepare for the exam, you should have a look at the last exercise sheet if you didn't so far.

Nice greetings

Michael
von mischnei
13. Feb 2009 15:29
Forum: Archiv
Thema: Exam topics
Antworten: 0
Zugriffe: 363

Exam topics

Hi,

we have published the topic list of our brainstorming during today's exercise session.

Have a nice weekend

Michael
von mischnei
11. Feb 2009 14:19
Forum: Archiv
Thema: Oberseminar cdc
Antworten: 0
Zugriffe: 503

Oberseminar cdc

Hey, as Prof. Buchmann mentioned today in the end of the lecture, there will be a talk in our Oberseminar about "MXL3: A new efficient algorithm for computing Groebner bases". If you are intested in the talk, feel free to visit it on Thursday, 12.2. at 11.40 in S202-B002 . You can also sign in for t...
von mischnei
9. Feb 2009 09:13
Forum: Archiv
Thema: Lecture(?) of Jintai Ding
Antworten: 5
Zugriffe: 888

Re: Lecture(?) of Jintai Ding

Sry, we mixed it up... the talk is at 14:00 in C120... Sry for the wrong information :-<
von mischnei
6. Feb 2009 09:09
Forum: Archiv
Thema: Lecture notes / literature
Antworten: 13
Zugriffe: 1423

Re: Lecture notes / literature

Dear students, I'm not sure, and at the moment I have no access to the TU network (so I can't check it), but I think the book "Post Quantum Cryptography" is not yet available at the Springerlink website. The one with "LNCS" is the proceedings of a conference held in Cincinnatti 2008. It is a collect...
von mischnei
5. Feb 2009 14:35
Forum: Archiv
Thema: Lecture(?) of Jintai Ding
Antworten: 5
Zugriffe: 888

Re: Lecture(?) of Jintai Ding

Hello, the talk of Prof. Jintai Ding will be at on monday, 9.2.2009 on 9:00 in S202-C110, the lecture room. Have a look at our Oberseminar-Website . We have lots of interesting talks announced there, which are usually on thursday, 11:40 in B002. You are always welcome there if you are interested in ...
von mischnei
2. Feb 2009 18:05
Forum: Archiv
Thema: Klausuranmeldung
Antworten: 1
Zugriffe: 440

Re: Klausuranmeldung

Hello,

there is no additional sign-in required to attend the exam. The only requirement is the correct sign-up at your corresponding Prüfungssekretariat.

Greetz

Michael
von mischnei
30. Jan 2009 14:11
Forum: Archiv
Thema: Fourth exercise
Antworten: 5
Zugriffe: 771

Fourth exercise

Hey all,

the first version of the fourth exercise sheet is online.

Have fun :->

Michael
von mischnei
27. Jan 2009 13:02
Forum: Archiv
Thema: Third exercise
Antworten: 2
Zugriffe: 645

Re: Third exercise

Hey, the solution of the third exercise can be found on the website . The exercise sheet was also updated (only little corrections). The fourth and last exercise will be held on Friday, 13.02.2009, 9:50h - 12:15h . We are sorry for that it's the last lecture day of the semester, but it is the only d...
von mischnei
19. Dez 2008 10:53
Forum: Archiv
Thema: Third exercise
Antworten: 2
Zugriffe: 645

Re: Third exercise

Hey,

we have added two more exercises to the actual sheet.

Have a nice christmas, see you next year!

Your PKK-Team :->
von mischnei
15. Dez 2008 16:20
Forum: Archiv
Thema: Third exercise
Antworten: 2
Zugriffe: 645

Third exercise

Hello,

The first two tasks of the third exercise can be found on the website.

Have a nice (christmas) time,

Michael

Zur erweiterten Suche