Home page of Ivan
I am a
professor at the computer
science department of Aarhus University.
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.
H-index: 55, computed using Google Scholar
New Book on
With Ronald Cramer and Jesper Buus Nielsen, I have just published a new book on
Information Theoretically Secure Multiparty Computation and Secret Sharing.
The book is published by Cambrigde University Press. Get it here.
The Provable Security Controversy
In 2006-2007, a controversy started about what proofs and security reductions in
cryptography actually mean and whether they are useful, a debate initiated (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.
At the computer science department, I teach the following courses:
I am currently involved with the following major research projects:
day-to-day work, I am head of the Cryptography
Group of the computer science department
I am a co-founder and owner of Cryptomathic, a local software and consulting company in data security and cryptography
am also a co-founder of Partisia,
implementation, based on secure
I play primarily fiddle and guitar, mostly Danish and Nordic folk music. I am or have been involved in 4 bands:
4-piece traditionally oriented band with 2 fiddles, accordion and
Instrumental traditional and
music for dancing and concerts. We released 1 LP, 4 CD’s and
several tapes and celebrated our
anniversary in 2009. The home page
info, pictures and sound clips.
A duo with
Pia Nygaard. We play nordic folk, insturmentels and songs, on fiddles,
mandolin and guitar.
The home page has more info, pictures and sound clips.
Originally a 4-piece band with
clarinet, accordion and double bass. After a long break, the
band was revived in 2013, now including a percussionist. On our Soundcloud page, you can hear some
new demo material. The old version of the band released one CD, “Waltz for a Princess”.
Some clips from that CD:
Listeren, schottish by Julie Heebøll
Waltz for a princess, by Julie HeebøllMadam Blå, hopsa by Ivan Damgård
A 4-piece band with fiddle, accordion,
double bass, guitar, mandolin etc. and vocals. Not active anymore.
and not so traditional folk for dancing,
parties. We released one CD “Zinklar”.
clips from a live recording:
Reels in A
og Vester (“East and West”,
traditional Danish song)
Bridal dances from the island of Fanø)