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CCS
2003
ACM
13 years 11 months ago
Using graphic turing tests to counter automated DDoS attacks against web servers
We present WebSOS, a novel overlay-based architecture that provides guaranteed access to a web server that is targeted by a denial of service (DoS) attack. Our approach exploits t...
William G. Morein, Angelos Stavrou, Debra L. Cook,...
JUCS
2006
225views more  JUCS 2006»
13 years 6 months ago
Restricting the View and Connecting the Dots - Dangers of a Web Search Engine Monopoly
: Everyone realizes how powerful the few big Web search engine companies have become, both in terms of financial resources due to soaring stock quotes and in terms of the still hid...
Narayanan Kulathuramaiyer, Wolf-Tilo Balke
SMC
2007
IEEE
150views Control Systems» more  SMC 2007»
14 years 9 days ago
An intelligent knowledge sharing system for web communities
— This paper presents the prototype of an expert peering system for information exchange in the knowledge society. Our system realizes an intelligent, real-time search engine for...
Christian Bauckhage, Tansu Alpcan, Sachin Agarwal,...
SIGMOD
2010
ACM
236views Database» more  SIGMOD 2010»
13 years 11 months ago
Differentially private aggregation of distributed time-series with transformation and encryption
We propose PASTE, the first differentially private aggregation algorithms for distributed time-series data that offer good practical utility without any trusted server. PASTE add...
Vibhor Rastogi, Suman Nath
SACMAT
2009
ACM
14 years 17 days ago
Towards formal security analysis of GTRBAC using timed automata
An access control system is often viewed as a state transition system. Given a set of access control policies, a general safety requirement in such a system is to determine whethe...
Samrat Mondal, Shamik Sural, Vijayalakshmi Atluri