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CLEF
2007
Springer
15 years 4 months ago
Using Geographic Signatures as Query and Document Scopes in Geographic IR
This paper reports the participation of the University of Lisbon at the 2007 GeoCLEF task. We adopted a novel approach for GIR, focused on handling geographic features and feature ...
Nuno Cardoso, David Cruz, Marcirio Silveira Chaves...
IJISEC
2007
87views more  IJISEC 2007»
14 years 9 months ago
Breaking four mix-related schemes based on Universal Re-encryption
Universal Re-encryption allows El-Gamal ciphertexts to be re-encrypted without knowledge of their corresponding public keys. This has made it an enticing building block for anonymo...
George Danezis
TCC
2007
Springer
116views Cryptology» more  TCC 2007»
15 years 4 months ago
Long-Term Security and Universal Composability
Abstract. Algorithmic progress and future technology threaten today’s cryptographic protocols. Long-term secure protocols should not even in future reveal more information to aâ€...
Jörn Müller-Quade, Dominique Unruh
IEICET
2008
119views more  IEICET 2008»
14 years 10 months ago
Universally Composable Identity-Based Encryption
Abstract-- The identity-based encryption (IBE) is one of the most important primitives in cryptography, and various security notions of IBE (e.g., IND-ID-CCA2, NM-ID-CCA2, IND-sID-...
Ryo Nishimaki, Yoshifumi Manabe, Tatsuaki Okamoto
CRYPTO
2007
Springer
162views Cryptology» more  CRYPTO 2007»
15 years 4 months ago
Universally-Composable Two-Party Computation in Two Rounds
Round complexity is a central measure of efficiency, and characterizing the round complexity of various cryptographic tasks is of both theoretical and practical importance. We show...
Omer Horvitz, Jonathan Katz