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Kontakt zum IKS

Am Fasanengarten 5
Geb. 50.34

D-76131 Karlsruhe

Tel.: + 49 721 608-44205
Fax: + 49 721 608-55022

E-Mail: info(at)iks.kit.edu

Contact to IKS

Am Fasanengarten 5
Building 50.34

76131 Karlsruhe

Germany

Phone: + 49 721 608-44205
Fax: + 49 721 608-55022

Email: info(at)iks.kit.edu

News

40 year anniversary of the Department of Informatics at KIT

From 12th to 13th of October 2012 the KIT Department of Informatics held its 40th anniversary. More information can be found on the corresponding website.

PeerEnergyCloud

The project PeerEnergyCloud was awarded with a price in the "Trusted Cloud" competition.

Matthias Huber at PITS 2012

Matthias Huber gave a talk at this year's "Public IT-Security" in Berlin about secure collaboration in the cloud. The congress was held from 9-25-12 to 9-26-12.

KASTEL at it-sa 2012

Our competence center KASTEL will be represented at the IT security expo it-sa 2012 in Nuremberg from 16th to 18th of October this year.

Science Exchange Program 2012 Shanghai-Karlsruhe

Within the Science Exchange Program 2012 Chinese and German students visit us to work on a cryptographic task for one week. More information can be found on the Department of Informatics website.

PHOENIX TV show on Cyberwar

Jörn Müller-Quade debates in a PHOENIX TV show on Friday, July 27th, at 1.45 pm about the topic Cyberwar.

KIT-Kinder-Uni 2012

On Tuesday, August 7th, our colleagues Christian Henrich and Daniel Kraschewski lecture about "Geheimschriften und wie man sie knackt" within KIT-Kinder-Uni 2012.

Day of IT Security

Within the Day of IT Security at IHK (Haus der Wirtschaft) in Karlsruhe on July 7th 2012 Jörn Müller-Quade talks about "Miracles through Cryptography."

CeBIT interview

Within the CeBIT 2012 the video channel of the KIT did an interview with Tobias Nilges about security in the cloud.

KA-IT-SI talk

On May 10th 2012 Dirk Achenbach gives a talk about secure cloud computing at a KA-IT-SI event at Messe Karlsruhe.

CLOUDZONE 2012

From May 10th to May 11th CLOUDZONE 2012 takes place at Messe Karlsruhe with interesting exhibitions (including our project MimoSecco). Further Jörn Müller-Quade and Christian Henrich moderates the Trendsession 2 at Trendkongress.

talKIT 2012

The event talKIT 2012 - das Technologieforum is taking place from May 9th to May 10th at KIT. Within talKIT 2012 Jörn Müller-Quade participates in a panel discussion.

Hannover Messe 2012

Within the Hannover Messe 2012 Jörn Müller-Quade took part in a panel discussion about security of urban infrastructures.

Girls'Day 2012

Our institute participates in the Girls'Day event, which is taking place on Thursday, 04-26-12.

KIT-Jahresempfang 2012

On 3-22-12 the Karlsruhe Institute of Technology (KIT) hosted this year's Jahresempfang. KASTEL and the IKS presented an IT security lounge with an Enigma.

CeBIT: Cumulus4j on ZDNet.de

ZDNet.de posts a short CeBIT review of the Cumulus4j project.

CeBIT: Handelsblatt interview

In Handelsblatt (No. 046 from 3-5-12) Jörn Müller-Quade talks about IT security in corporate networks.

Television report in ARD Mittagsmagazin

Jörn Müller-Quade talks about the security of critical infrastructures in the television show ARD Mittagsmagazin.

Lecture prizes

Within the Semesterkolloquium at the faculty for computer science at the KIT Jörn Müller-Quade und Dennis Hofheinz received prizes for the lectures Sicherheit and Komplexitätstheorie, respectively.

"Cryptography at your fingertips"

From 2012 on, KASTEL will cooperate with the Karlsruher IT-Sicherheitsinitiative KA-IT-Si in order to improve knowledge transfer between research and industry. The cooperation will get under way on the 26th of January 2012 with lectures and demonstrations under the title "Cryptography at your fingertips". We refer to the press release for more information.

New project: CLOUDwerker

The project CLOUDwerker starts on 01-24-2012. Further information can be found on the project page.

"Cryptography at your fingertips"

From 2012 on, KASTEL will cooperate with the Karlsruher IT-Sicherheitsinitiative KA-IT-Si in order to improve knowledge transfer between research and industry. The cooperation will get under way on the 26th of January 2012 with lectures and demonstrations under the title "Cryptography at your fingertips".

 

All news

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News

40 year anniversary of the Department of Informatics at KIT

From 12th to 13th of October 2012 the KIT Department of Informatics held its 40th anniversary. More information can be found on the corresponding website.

PeerEnergyCloud

The project PeerEnergyCloud was awarded with a price in the "Trusted Cloud" competition.

Matthias Huber at PITS 2012

Matthias Huber gave a talk at this year's "Public IT-Security" in Berlin about secure collaboration in the cloud. The congress was held from 9-25-12 to 9-26-12.

KASTEL at it-sa 2012

Our competence center KASTEL will be represented at the IT security expo it-sa 2012 in Nuremberg from 16th to 18th of October this year.

Science Exchange Program 2012 Shanghai-Karlsruhe

Within the Science Exchange Program 2012 Chinese and German students visit us to work on a cryptographic task for one week. More information can be found on the Department of Informatics website.

PHOENIX TV show on Cyberwar

Jörn Müller-Quade debates in a PHOENIX TV show on Friday, July 27th, at 1.45 pm about the topic Cyberwar.

KIT-Kinder-Uni 2012

On Tuesday, August 7th, our colleagues Christian Henrich and Daniel Kraschewski lecture about "Geheimschriften und wie man sie knackt" within KIT-Kinder-Uni 2012.

Day of IT Security

Within the Day of IT Security at IHK (Haus der Wirtschaft) in Karlsruhe on July 7th 2012 Jörn Müller-Quade talks about "Miracles through Cryptography."

CeBIT interview

Within the CeBIT 2012 the video channel of the KIT did an interview with Tobias Nilges about security in the cloud.

KA-IT-SI talk

On May 10th 2012 Dirk Achenbach gives a talk about secure cloud computing at a KA-IT-SI event at Messe Karlsruhe.

CLOUDZONE 2012

From May 10th to May 11th CLOUDZONE 2012 takes place at Messe Karlsruhe with interesting exhibitions (including our project MimoSecco). Further Jörn Müller-Quade and Christian Henrich moderates the Trendsession 2 at Trendkongress.

talKIT 2012

The event talKIT 2012 - das Technologieforum is taking place from May 9th to May 10th at KIT. Within talKIT 2012 Jörn Müller-Quade participates in a panel discussion.

Hannover Messe 2012

Within the Hannover Messe 2012 Jörn Müller-Quade took part in a panel discussion about security of urban infrastructures.

Girls'Day 2012

Our institute participates in the Girls'Day event, which is taking place on Thursday, 04-26-12.

KIT-Jahresempfang 2012

On 3-22-12 the Karlsruhe Institute of Technology (KIT) hosted this year's Jahresempfang. KASTEL and the IKS presented an IT security lounge with an Enigma.

CeBIT: Cumulus4j on ZDNet.de

ZDNet.de posts a short CeBIT review of the Cumulus4j project.

CeBIT: Handelsblatt interview

In Handelsblatt (No. 046 from 3-5-12) Jörn Müller-Quade talks about IT security in corporate networks.

Television report in ARD Mittagsmagazin

Jörn Müller-Quade talks about the security of critical infrastructures in the television show ARD Mittagsmagazin.

Lecture prizes

Within the Semesterkolloquium at the faculty for computer science at the KIT Jörn Müller-Quade und Dennis Hofheinz received prizes for the lectures Sicherheit and Komplexitätstheorie, respectively.

"Cryptography at your fingertips"

From 2012 on, KASTEL will cooperate with the Karlsruher IT-Sicherheitsinitiative KA-IT-Si in order to improve knowledge transfer between research and industry. The cooperation will get under way on the 26th of January 2012 with lectures and demonstrations under the title "Cryptography at your fingertips". We refer to the press release for more information.

New project: CLOUDwerker

The project CLOUDwerker starts on 01-24-2012. Further information can be found on the project page.

"Cryptography at your fingertips"

From 2012 on, KASTEL will cooperate with the Karlsruher IT-Sicherheitsinitiative KA-IT-Si in order to improve knowledge transfer between research and industry. The cooperation will get under way on the 26th of January 2012 with lectures and demonstrations under the title "Cryptography at your fingertips".

 

All news

Symmetric Encryption Systems

Lecturer

Lecturer: Willi Geiselmann, Daniel Kraschewski

 

Dates and Location

Tuesday: 9:45 - 11:15 Room 236 (Buildung 50.34)

 

Content

Zunächst werden in einem kurzen Exkurs einige historische Chiffren und ihre Schwächen vorge-stellt. Hauptinhalt der Vorlesung sind die Vorstellung moderner Blockchiffren, Diskussion der Stärken und Schwächen gebräuchlicher Betriebsmodi und die Behandlung aktueller Angriffs-techniken (vordergründig lineare und differentielle Kryptoanalyse). Für den Abschluss der Vorlesung ist ein Abschnitt zu Hashfunktionen und symmetrischer Authentifikation geplant.

Größere Teile der Vorlesung orientieren sich am ehemlagigen SCC2-Skript "Datensicherheitstechnik".

 

Course Map

Lecture 13.04.2010

  • Aufgaben der Kryptographie
  • Gebiete der Kryptographie
    (symmetrische & asymmetrische Kryptographie, Steganographie)
  • Typen von Angriffen
  • Caesar Chiffre

Lecture 20.04.2010

  • Vigenere Chiffre (Angriff über Koinzidenzindex)
  • Vernam Chiffre, one-time-pad
  • Enigma (Funktionsweise, Schwäche)

Lecture 27.04.2010

  • Hagelin C34  (Funktionsweise und Angriff)
  • Einführung Blockchiffren
  • Betriebsmodi von Blockchiffren (ECB, CBC)

Lecture 04.05.2010

  • Betriebsmodi von Blockchiffren (CFB, OFB)
  • Vorstellung von DES und 3DES

Lecture 11.05.2010

  • Meet-in-the-Middle-Attacke auf 2DES
  • lineare Kryptoanalyse am Beispiel FEAL

Lecture 18.05.2010

  • lineare Kryptoanalyse von DES
  • Erweiterung von (2n+1)-Runden-Charakteristiken auf 2n+3 Runden
  • Piling-up Lemma
  • "Praxisrelevanz" von linearer und differentieller Kryptoanalyse

Lecture 25.05.2010

  • differentielle Kryptoanalyse von DES
  • 1-Runden Angriff mit differentieller Analyse
  • 1-Runden Angriff direkt über S-Box
  • 3-Runden Angriff mit differentieller Analyse
  • 2-Runden-Charakteristik
  • damit Angriff auf z.B. 6-Runden DES

Lecture 01.06.2010

  • Skipjack
  • differentielle Analyse von 25 Runden Skipjack mit unmöglichen Charakteristiken

Lecture 08.06.2010

  • Funktionsweise des AES
  • Eigenschaften von kryptographischen Hashfunktionen
    (urbildresistent, kollisionsresistent)

Lecture 15.06.2010

  • Merkle-Damgaard-Schema (Grundaufbau der meisten Hashfunktionen)
  • Aufbau von SHA-1
  • Konstruktion "sinnvoller Hash-Kollisionen" aus zufälligen Kollisionen
  • Einführung von Random Oracle (RO) und Ideal Cipher (IC)

Lecture 22.06.2010

  • Äquivalenz von RO- und IC-Modell
  • informationstheoretisch sichere MACs (Carter-Wegman mit Toeplitz-Matrizen)

Lecture 29.06.2010

  • HMAC
  • abstreitbar authentifizierter Nachrichtenaustausch
  • formale Sicherheitsbegriffe (ROR-/IND-/NM-CPA/-CCA1/-CCA2)

Lecture 06.07.2010

  • Beziehungen zwischen den 9 Sicherheitsbegriffen (ROR-/IND-/NM-CPA/-CCA1/-CCA2)
  • Welche Betriebsmodi (ECB, CBC, CFB, OFB) erfüllen welchen Begriff?
  • Authenticated Encryption

Lecture 13.07.2010

  • Lightweight Authentication, z.B. für RFID (HB,HB+)
  • LPN-Problem
  • aktiver Angriff gegen HB
  • Man-in-the-Middle gegen HB+