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CRYPTO
2006
Springer
109views Cryptology» more  CRYPTO 2006»
13 years 11 months ago
Construction of a Non-malleable Encryption Scheme from Any Semantically Secure One
There are several candidate semantically secure encryption schemes, yet in many applications non-malleability of encryptions is crucial. We show how to transform any semantically s...
Rafael Pass, Abhi Shelat, Vinod Vaikuntanathan
APLAS
2008
ACM
13 years 9 months ago
An Operational Semantics for JavaScript
We define a small-step operational semantics for the ECMAScript standard language corresponding to JavaScript, as a basis for analyzing security properties of web applications and ...
Sergio Maffeis, John C. Mitchell, Ankur Taly
SSDBM
2002
IEEE
128views Database» more  SSDBM 2002»
14 years 17 days ago
Compressing Bitmap Indexes for Faster Search Operations
In this paper, we study the effects of compression on bitmap indexes. The main operations on the bitmaps during query processing are bitwise logical operations such as AND, OR, N...
Kesheng Wu, Ekow J. Otoo, Arie Shoshani
ICDT
2010
ACM
180views Database» more  ICDT 2010»
14 years 5 months ago
Foundations of SPARQL Query Optimization
We study fundamental aspects related to the efficient processing of the SPARQL query language for RDF, proposed by the W3C to encode machine-readable information in the Semantic W...
Michael Schmidt, Michael Meier, Georg Lausen