Applications designed for groups of participants are widely deployed(routing protocols, DRM systems, P2P networks), or will be ready fordeployment in the near future (digital conferences, collaborativework, electronic elections). This situation fosters research interestin distributed cryptographic protocols and their implementation aspects.

The Horst-Görtz-Institute ( www.hgi.rub.de ) is Germany largestacademic research institute for IT security covering all aspects ofthe field from mathematical cryptography to implementations. The chairfor network and data security ( www.nds.rub.de ) is currently involvedin the following research fields:

• group based cryptography (group key agreement, formal models forgroup security, group signatures),
• digital content protection (DRM, broadcast encryption),
• XML and WS security (XMaiL project, browser-based cryptographicprotocols), and
• technical protections against phishing and pharming (www.a-i3.org ).

This PhD position is intended to strengthen our research in groupbased cryptography. Applicants should have excellent knowledge inmodern cryptography and good knowledge in at least one of thefollowing fields:

• key agreement protocols for groups,
• group signatures,
• formal models for cryptographic protocols.

In order to actively participate in the research group, applicantsshould have basic knowledge and interest in Internet security, WorldWide Web technology and XML.

Qualification: university diploma in computer science, mathematics, orelectrical engineering.

Teaching load: 4 hours per week on average during the teaching term;tutorials, seminars, or independent instruction.

Designation: Wissenschaftlicher Mitarbeiter, BAT IIa, salary dependson age and family status (www.ruhr-uni-bochum.de/bat/Tabellen/verguetungstabellen.html ).Initial appointment is for three years, extension by two more yearspossible. The applicants are supposed to be willing to apply forthirdparty research grants.

Women and handicapped person are particularly invited to apply andwill be given priority in case of equal qualifications in accordancewith the relevant bylaws.

Please email your application as a single PDF file tojoerg.schwenk@rub.de , or send it to:

Prof. Dr. Jörg Schwenk
Lehrstuhl für Netz- und Datensicherheit
Fakultät für Elektrotechnik und Informationstechnik
Ruhr-Universität Bochum
Universitätsstrasse 150
D-44780 Bochum
Germany

Closing date: October 24th, 2006