Home page of Ivan Damgård

Home page of Ivan Damgård

I am a professor at the computer science department of Aarhus University. Below, you will find links, most of which are
related to my main research interests: cryptography, data security, discrete math, quantum information, algorithms and complexity.
Finally there are links connected to my main interest aside from work: music, and folk music in particular.

List of research papers
Available here.
Last update: November 5, 2001, for later papers, refer to publications at www.brics.dk and Springer Verlags LNCS series.

The Provable Security Controversy
Recently, there has been some controversy about what proofs and security reductions in
cryptography actually mean and whether they are useful, a debate started (among others) by
Koblitz and Menezes. Unfortunately, a lot of this important debate has been obscured by
misunderstandings and misconceptions. In the hope of helping to clarify some of these issues,
I post here my position paper on the subject, A "Proof-Reading" of Some Issues in
Cryptography, which appeared in ICALP 2007.
The version here is a slightly updated version of what appears in the proceedings.
Get the PFD-file.

Courses
At the computer science department, I teach the following courses:

The Introductory Cryptography course that runs in the fall (1.+2 .quater); and
The Cryptologic Protocol Theory course that runs in the spring (3.+4. quater)
The Course in Quantum Information Processing that runs in the fall (1.+2 .quater)
The dSik course, an introductory course in IT security (in Danish) that runs in the spring (4. quater)

Projects, etc.
I am currently involved with the following major research projects:

BRICS, Basic Research in computer Science
FICS, Foundations in Cryptography and Security
SCET, Secure Computing, Economy and Trust (link is in Danish)
Center for IT security (AICIS, link in Danish)
CKI, Center for Quantum Information Processing (formally existed only up to end of 2001, but some activities remain).

In day-to-day work, I am a part of the Cryptography Group of the computer science department

Business
I am a co-founder and owner of Cryptomathic, a local software and consulting company in data security and cryptography.

Music
I play primarily fiddle and guitar, mostly Danish and Nordic folk music. Currently, I play with two bands:

Jydsk på Næsen (currently only in Danish, see an English Summary here)
Ostinat Expressen

Both bands play contemporary folk music with a strong link to Danish traditional dance music. Both have released CD's, available from
GO Folkmusic Distribution. The bands can be booked through the band home pages above.

If you want to know more about Danish folkmusic, have a look at Folkmusic.dk. Other places of interest are
spillemanden.dk (in Danish) and the Danish Folkmusic Council.