Multy-party Security Protocols
My research area is the field of multy-party security protocols,
whereby I focus mainly on anonymity issues.
Currently I work on the specification, implementation and analysis of a
general-purpose secure anonymity architecture (more info [here]).
It should become a general framework for different anonymity services ranging from
anonymous message sending to anonymous authorization (e.g. e-payment, e-voting), built-up
as an extensible layer hierarchy (ADL-Anonymous Datagram Layer, ASL-Anonymous Session Layer, AH-Anonymous Handshake)
on top of the Internet's TCP/IP.
This research idea has been prized by the Werner von Siemens Award 2003,
for which the project describing application can be downloaded
The PROB-channel (Passive, Real-time, Observable, Black-box) is a formally defined anonymous
message sending technique. Aim was to specify a simple scenario, where a theoretically
based measure for the unspecified term "anonymity" could be given. Thus the paper presenting
the model (submitted to PET'04, [PDF])
introduces the source and destination hiding properties to act as such measures and
defines criteria to achieve a given level of anonymity.
The PROB-channel was implemented as the first anonymous message transmission technique
to conform to the ADL layer interface in the GPSAA project.
The Anonymity Enhancing Protocol (AEP) was originally designed as a general framework for
anonymous authorization techniques (such as e-payment, etc.). It specified the interfaces
and communication between three parties: the anonymous subject, the service provider
and the anonymity authority (see more [here]).
Currently AEP is being integrated into GPSAA as an implementation to conform to the AH (Anonymous Handshake)
The list of my publications can be found [here].