TY - GEN A1 - Magnus, Sebastian A1 - Maron, Markus T1 - A public key infrastructure in ambient information and transaction systems N2 - Conventional security infrastructures in the Internet cannot be directly adopted to ambient systems, especially if based on short-range communication channels: Personal, mobile devices are used and the participants are present during communication, so privacy protection is a crucial issue. As ambient systems cannot rely on an uninterrupted connection to a Trust Center, certiffed data has to be veriffed locally. Security techniques have to be adjusted to the special environment. This paper introduces a public key infrastructure (PKI) to provide secure communication channels with respect to privacy, confidentiality, data integrity, non-repudiability, and user or device authentication. It supports three certiffcate levels with a different balance between authenticity and anonymity. This PKI is currently under implementation as part of the iCity project. T3 - Arbeitsberichte, FB Informatik - 2009,11 KW - public key infrastructure KW - privacy protection KW - iCity project Y1 - 2010 UR - https://kola.opus.hbz-nrw.de/frontdoor/index/index/docId/379 UR - https://nbn-resolving.org/urn:nbn:de:kola-3791 ER -