<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>10</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">BARRETO, Paulo S. L. M.</style></author><author><style face="normal" font="default" size="100%">DEUSAJUTE, A. M.</style></author><author><style face="normal" font="default" size="100%">CRUZ, E.</style></author><author><style face="normal" font="default" size="100%">PEREIRA, G.</style></author><author><style face="normal" font="default" size="100%">SILVA, R. R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Toward Efficient Certificateless Signcryption from (and without) Bilinear Pairings</style></title><secondary-title><style face="normal" font="default" size="100%">8th Brazilian Symposium on Information and Computer Systems Security </style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">SBSeg'2008</style></tertiary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://sbseg2008.inf.ufrgs.br/proceedings/data/pdf/st03_03_artigo.pdf</style></url></web-urls></urls><pub-location><style face="normal" font="default" size="100%">Gramado, RS</style></pub-location><pages><style face="normal" font="default" size="100%">115 - 125</style></pages><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&amp;nbsp;&lt;/p&gt;
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&lt;p align=&quot;left&quot;&gt;&lt;font face=&quot;rtxi&quot;&gt;&lt;/font&gt;&lt;font face=&quot;NimbusRomNo9L-ReguItal&quot;&gt;cient certificateless signcryption scheme. Contrary to the usual paradigm of converting identitybased encryption and signature schemes into a combined certificateless protocol, we adopt the approach of extending a conventional signcryption method with a certificateless key validation mechanism, resorting to the underlying identity-based techniques, and as a onsequence to pairings, exclusively to validate the associated public keys. The result is as e&lt;/font&gt;&lt;font face=&quot;rtxi&quot;&gt;&lt;/font&gt;&lt;font face=&quot;NimbusRomNo9L-ReguItal&quot;&gt;cient as the underlying signcryption method as long as the amortized cost of this validation is low, as is the case of our concrete proposal.&lt;/font&gt;&lt;/p&gt;
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&lt;p align=&quot;left&quot;&gt;In this paper we describe how to construct an e&lt;/p&gt;</style></abstract></record></records></xml>