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COMCOM
2008
104views more  COMCOM 2008»
13 years 7 months ago
A network-assisted mobile VPN for securing users data in UMTS
This paper proposes a network-assisted mobile Virtual Private Network (mVPN) security scheme that provides secure remote access to corporate resources over the Universal Mobile Te...
Christos Xenakis, Christoforos Ntantogian, Ioannis...
SACMAT
2006
ACM
14 years 1 months ago
Fine-grained role-based delegation in presence of the hybrid role hierarchy
Delegation of authority is an important process that needs to be captured by any access control model. In role-based access control models, delegation of authority involves delega...
James B. D. Joshi, Elisa Bertino
CCS
2006
ACM
13 years 11 months ago
Safety analysis of usage control authorization models
The usage control (UCON) model was introduced as a unified approach to capture a number of extensions for traditional access control models. While the policy specification flexibi...
Xinwen Zhang, Ravi S. Sandhu, Francesco Parisi-Pre...
SIGMOD
2007
ACM
150views Database» more  SIGMOD 2007»
14 years 7 months ago
Exploiting self-monitoring sample views for cardinality estimation
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
Jingren Zhou, Per-Åke Larson, Peter Zabback,...
SIGCOMM
2006
ACM
14 years 1 months ago
Understanding the network-level behavior of spammers
This paper studies the network-level behavior of spammers, including: IP address ranges that send the most spam, common spamming modes (e.g., BGP route hijacking, bots), how persi...
Anirudh Ramachandran, Nick Feamster