Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

On the security of fair non-repudiation protocols

: Gürgens, S.; Rudolph, C.; Vogt, H.


Boyd, C.:
Information security. 6th international conference, ISC 2003 : Bristol, UK, October 1 - 3, 2003; proceedings
Berlin: Springer, 2003 (Lecture Notes in Computer Science 2851)
ISBN: 3-540-20176-9
ISSN: 0302-9743
Information Security Conference (ISC) <6, 2003, Bristol>
Conference Paper
Fraunhofer SIT ()
protocols; E-Commerce

We analyzed two non-repudiation protocols and found some new attacks on the fairness and termination property of these protocols. Our attacks are enabled by several inherent design weaknesses, which also apply to other non-repudiation protocols. To prevent these attacks, we propose generic countermeasures that considerably strengthen the design and implementation of non-repudiation protocols. The application of these countermeasures is finally shown by our construction of a new fair non-repudiation protocol.