Second exercise

mischnei
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Second exercise

Beitrag von mischnei » 14. Nov 2008 13:01

Dear students,

the first four tasks of the second exercise are now available online. They deal with hash based cryptography, as the last lectures did. We are going to add some more tasks to the second exercise sheet concerning lattices when the lecture has advanced.

The next exercise session will be held on Friday, 5.12.2008 from 9:50 to 12:15 in A213.

Have a nice weekend

Michael

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Patr0rc
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Re: Second exercise

Beitrag von Patr0rc » 17. Nov 2008 11:22

Hey guys,
in task 4 there is a mistake in the value for the checksum in my opinion. I think you forgot to add "the last decimal component of H(M)", could this be?
The checksum should be 21 (than 17), so that 21(dec)=010101(bin)=010||101=2(dec)||5(dec), right?
Greetings.

mischnei
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Re: Second exercise

Beitrag von mischnei » 17. Nov 2008 12:14

Hello,

you are right, a corrected version is available online. There was another mistake in the same task, the last two of the the bit values in brackets in the signing line were wrong, they were also corrected.

Thanks a lot! Have a nice day,

Michael

rlindner
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Re: Second exercise

Beitrag von rlindner » 28. Nov 2008 10:06

Another update for Exercise 2 is available on the webpage.

Have a look and find out what it's about!
Richard

mischnei
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Re: Second exercise

Beitrag von mischnei » 9. Dez 2008 18:59

Hey folks,

the solution of the second exercise is published on the website.

Nice evening, see you tomorrow,

Michael

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