Trustworthy 100-year digital objects: Evidence after every witness is dead
ACM Transactions on Information Systems (TOIS)
Propagating multitrust within trust networks
Proceedings of the 2008 ACM symposium on Applied computing
A reputation system for electronic negotiations
Computer Standards & Interfaces
New adaptive trust models against DDoS: back-up CA and mesh PKI
HSI'03 Proceedings of the 2nd international conference on Human.society@internet
PETS'10 Proceedings of the 10th international conference on Privacy enhancing technologies
Defamation-free networks through user-centered data control:
STM'10 Proceedings of the 6th international conference on Security and trust management
Cloud-DLS: Dynamic trusted scheduling for Cloud computing
Expert Systems with Applications: An International Journal
Managing trust in distributed agent systems
ATC'06 Proceedings of the Third international conference on Autonomic and Trusted Computing
Modeling Decentralized Reputation-Based Trust for Initial Transactions in Digital Environments
ACM Transactions on Internet Technology (TOIT)
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Most currently deployed Public Key Infrastructures (PKIs) are hierarchically oriented and rely on a centralized design. Hierarchical PKIs may be appropriate solutions for many usage-scenarios, but there exists the viable alternative of the 'Web of Trust'. In a web of trust, each user of the system can choose for himself whom he elects to trust, and whom not. After contrasting the properties of web-of-trust based PKIs to those of hierarchical PKIs, an introduction to webs of trust and to quantitative trust calculations is given. The paper concludes with the presentation of an efficient, sub-exponential algorithm that allows heuristic computations of trust paths in a web of trust.