Fakultät für Informatik | KIT | Deutsch |  English

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

[Translate to englisch:] Nichts

[Translate to englisch:] bla

[Translate to englisch:] Nichts

[Translate to englisch:] bla

[Translate to englisch:] Nichts

[Translate to englisch:] bla

[Translate to englisch:] Nichts

[Translate to englisch:] bla

[Translate to englisch:] Nichts

[Translate to englisch:] bla

[Translate to englisch:] Nichts

[Translate to englisch:] bla

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

Symmetrische Verschlüsselungsverfahren (Vorlesung im SS 2012)

Dozent

Dozent: Jörn Müller-Quade, Daniel Kraschewski

Termine und Ort

Mittwochs (18.4.2012 - 18.7.2012), 9:45h - 11:15h, Raum 236 (Geb. 50.34)

Inhalt

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.

Link zur Vorjahresveranstaltung

Themenübersicht

Vorlesung am 18.04.2011

  • Aufgaben & Gebiete der Kryptographie
  • Cäsar-Chiffre & allg. mono-alphabetische Substitution
  • Vigenère-Chiffre & Angriffe über Koinzidenzindex und Autokorrelation
  • Hagelin C34 (Funktionsweise und Known-Plaintext-Angriff)
  • Permutations-Chiffre & Angriff über Bigramm-Statistiken

Vorlesung am 25.04.2011

  • Was ist eine Blockchiffre? (formale Definition)
  • Ideal Cipher
  • Bausteine von Blockchiffren (Confusion & Diffusion)
  • DES (Aufbau/Funktionsweise & Entwurfskriterien)
  • Konstruktionen zur Schlüsselvergrößerung (3DES, DESX)

Vorlesung am 02.05.2011

  • Meet-in-the-Middle (gegen 2DES)
  • "advanced Meet-in-the-Middle" (gegen 2KEY-3DES)
  • Slide-Attacks

Vorlesung am 09.05.2011

  • advanced Slide-Attack (gegen DESX)
  • Related-Key-Attack (gegen LOKI89)

Vorlesung am 16.05.2011

  • Vorstellung von FEAL (Fast Encryption ALgorithm)
  • lineare Abhängigkeiten in den Ein- & Ausgabebits der F-Funktion von FEAL
  • lienare Kryptoanalyse von FEAL4

Vorlesung am 23.05.2011

  • lineare Kryptoanalyse von DES
    • lineare Approximation von S-Boxen
    • Erweiterung von n-Runden-Charakteristiken auf n+2 Runden

Vorlesung am 30.05.2011

  • differentielle Kryptoanalyse (am Beispiel DES)
    • Angriffsprinzip, Aufbau Differenzentabelle
    • 2-Runden-Angriff, 3-Runden-Angriff
    • stabile Charakteristiken für 2n-Runden-Angriff

Vorlesung am 06.06.2011

  • Einführung Skipjack (historisches, Aufbau/Funktionsweise)
  • differentielle Analyse mittels unmöglicher Charakteristik gegen 25-Runden-Skipjack

Vorlesung am 13.06.2011

  • AES (Auswahlkriterien & Vorstellung der 5 Finalisten)
  • Aufbau/Funktionsweise von Rijndael
  • Schwächen von Rijndael, beste bekannte Angriffe

Vorlesung am 20.06.2011

  • Betriebsmodi für Blockchiffren (ECB, CBC, CFB, OFB)

Vorlesung am 27.06.2011

  • Fortsetzung Betriebsmodi (CTR)
  • Probleme bei schwachen Schlüsseln (OFB = Vigenère)
  • Birthday-Attacke gegen CBC
  • formale Sicherheitsbegriffe (ROR-/IND-cpa/-cca1/-cca2)

Vorlesung am 04.07.2011

  • Fortsetzung formale Sicherheitsbegriffe (NM-cpa/-cca1/-cca2)
  • Beziehungen zwischen den Sicherheitsberiffen
  • Welche Betriebsmodi (ECB, CBC, CFB, OFB, CTR) erfüllen welchen Begriff?

Vorlesung am 11.07.2011

  • Eigenschaften kryptographischer Hashfunktionen (Einweg-Eigenschaft, Kollisionsresistenz)
  • Random-Oracle-Modell, Äquivalenz zum Ideal-Cipher-Modell
  • Merkle-Damgård-, Widepipe- und Fast-Widepipe-Konstruktion
  • Aufbau von SHA-1
  • Angriffsansätze gegen Hashfunktionen

Vorlesung am 18.07.2011

  • praktische Angriffe basierend auf "sinnlosen" Hashkollisionen
  • Definition: Message Authentication Code (MAC)
  • HMAC, CBC-MAC, OMAC
  • abstreitbare Nachrichten-Authentifikation

Material

Es gibt ein brandneues Skript: ergänzte Version vom 11.7.2012. (Ist noch sehr frisch und könnte vereinzelt Fehler enthalten; Korrekturvorschläge bitte an Daniel Kraschewski.)

Außerdem gibt es ein rudimentäres ASCII-Skript, in welchem auf Elemente des ehemlagigen SCC2-Skripts "Datensicherheitstechnik" und der folgenden weiterführenden Literatur zurückgegriffen wird: