Christian Rechberger

Welcome to my academic website. I'm currently a postdoctorial research associate at ENS Ulm, and previously had similar roles at KU Leuven and TU Graz, and was a visiting researcher at MSR Redmond. Since 2008 I'm coordinating the hash function working group within the ECRYPT II Network of Excellence. CV is available upon request.

My research is centered around the design, analysis, and implementation of the fundamental building blocks that form the basis of current and future IT systems: ciphers, hash functions, authentication codes. Applications range from tiny RFID tags to cloud computing services.

Contact:

christian.rechberger@groestl.info

Postdoc at: Département d'informatique École normale supérieure 45 rue d'Ulm F-75230 Paris Cedex 05 France	Visiting researcher at: Microsoft Research One Microsoft Way Redmond, WA 98052-6399 U.S.	New with Nov 1st Associate professor at: DTU MAT, Crypto group Matematiktorvet B. 303S DK-2800 Lyngby Denmark

Upcoming and recent events:

When?	Where?	What?	more infos
July 1, 2011	Paris, FRA	Bicliques for Block Cipher Cryptanalysis: New Results on AES	Seminar at ENS Ulm
August 8-10, 2011	Redmond, USA	Workshop on Symmetric Cryptanalysis	Specialized one-of-a-kind event in North America: half talks, half brainstorming
New:August 16, 2011	Santa Barbara, USA	Biclique Cryptanalysis of the Full AES	Crypto Rump Session Announcement Project website

Program committees:

Currently:
Asiacrypt 2011, IWSEC 2011, Indocrypt 2011, WEWoRC 2011

Selection of past committees:
Eurocrypt 2009, FSE 2009-2011, Hash 2011 (chair), Indocrypt 2008, Latincrypt 2010, SAC 2010, Weworc 2009 (chair)

Recent publications:

"Rotational Rebound Attacks on Reduced Skein"
with Dmitry Khovratovich and Ivica Nikolic [pdf]
Appeared at Asiacrypt 2010
Best results on the SHA-3 candidate Skein. Awarded "Best Paper" and received invitation to Journal of Cryptology.

"Advanced Meet-in-the-Middle Preimage Attacks: First Results on Full Tiger, and Improved Results on MD4 and SHA-2"
with Jian Guo, San Ling, and Huaxiong Wang [pdf]
Appeared at Asiacrypt 2010
Among other results, gives the first attack on the hash function Tiger as proposed in 1996.

New: "Bicliques for Preimages: Attacks on Skein-512 and the SHA-2 family"
with Dmitry Khovratovich and Alexandra Savelieva [pdf]
Introduces "Biclique Cryptanalysis". Improved Results on the SHA-2 hash functions and the SHA-3 finalist Skein.

New: "Biclique Cryptanalysis of the Full AES"
with Andrey Bogdanov and Dmitry Khovratovich [pdf]
First cryptanalytic results on the full AES block cipher. All Versions. No related-key assumptions needed. First application of "Biclique Cryptanalysis" to block ciphers.
Project website

Most of my publications are indexed by DBLP, repositories of different subsets can be found either here or here. Maybe this is also useful.

For a list of related talks until 2009, see e.g. here.