Browsing by Author "Herranz Sotoca, Javier"
Now showing items 1-20 of 36
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A cryptographic solution for private distributed simple meeting scheduling
(IOS Press, 2009)
Conference report
Open AccessMeeting scheduling is a suitable application for distributed computation motivated by its privacy requirements. Previous work on this problem have considered some cryptographic and conceptually clear approach to solve a ... -
Attribute-based encryption implies identity-based encryption
(2017-11-01)
Article
Open AccessIn this study, the author formally proves that designing attribute-based encryption schemes cannot be easier than designing identity-based encryption schemes. In more detail, they show how an attribute-based encryption ... -
Attribute-based versions of Schnorr and ElGamal
(2016-01)
Article
Open AccessWe design in this paper the first attribute-based cryptosystems that work in the classical discrete logarithm, pairing-free, setting. The attribute-based signature scheme can be seen as an extension of Schnorr signatures, ... -
Attribute selection in multivariate microaggregation
(2008)
Conference report
Restricted access - publisher's policyMicroaggregation is one of the most employed microdata protection methods. The idea is to build clusters of at least k original records, and then replace them with the centroid of the cluster. When the number of attributes ... -
Cifrado homomorfico de clave publica basado en Residuosidad Cuadratica
(2012)
Conference report
Open AccessLos esquemas de cifrado de clave p´ ublica con propiedades homom´orficas tienen muchas utilidades en aplicaciones reales. Entre los esquemas con propiedades homom´orficas aditivas existentes, hay una familia (desde el ... -
Classifying data from protected statistical datasets
(2010-06-09)
Article
Open AccessStatistical Disclosure Control (SDC) is an active research area in the recent years. The goal is to transform an original dataset X into a protected one X0, such that X0 does not reveal any relation between confidential ... -
CODIS I CRIPTOGRAFIA
(Universitat Politècnica de Catalunya, 2016-12-22)
Exam
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CODIS I CRIPTOGRAFIA
(Universitat Politècnica de Catalunya, 2015-01-09)
Exam
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CODIS I CRIPTOGRAFIA
(Universitat Politècnica de Catalunya, 2016-11-02)
Exam
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CODIS I CRIPTOGRAFIA
(Universitat Politècnica de Catalunya, 2016-01-08)
Exam
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Constant size ciphertexts in threshold attribute-based encryption
(Springer Verlag, 2010)
Conference report
Open AccessAttribute-based cryptography has emerged in the last years as a promising primitive for digital security. For instance, it provides good solutions to the problem of anonymous access control. In a ciphertextpolicy attribute-based ... -
Distributed privacy-preserving methods for statistical disclosure control
(2010)
Article
Restricted access - publisher's policyStatistical disclosure control (SDC) methods aim to protect privacy of the confidential information included in some databases, for example by perturbing the non-confidential parts of the original databases. Such methods ... -
Efficient cryptosystems from 2k-th power residue symbols
(2017-04)
Article
Open AccessGoldwasser and Micali (J Comput Syst Sci 28(2):270–299, 1984) highlighted the importance of randomizing the plaintext for public-key encryption and introduced the notion of semantic security. They also realized a cryptosystem ... -
Examen final
(Universitat Politècnica de Catalunya, 2019-01-22)
Exam
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Examen final
(Universitat Politècnica de Catalunya, 2018-06-06)
Exam
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Examen MQ
(Universitat Politècnica de Catalunya, 2018-10-29)
Exam
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Examen MQ
(Universitat Politècnica de Catalunya, 2018-04-06)
Exam
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Firmas digitales con verificación distribuida en el modelo de seguridad estándar
(2012)
Conference report
Open AccessLas firmas digitales con verificaci´on distribuida protegen en cierta manera el nivel de anonimato o privacidad del firmante, ya que un subconjunto autorizado de usuarios deben colaboran para verificar la (in)validez ... -
How to group attributes in multivariate microaggregation
(2008-04-01)
Article
Restricted access - publisher's policyMicroaggregation is one of the most employed microdata protection methods. It builds clusters of at least k original records, and then replaces these records with the centroid of the cluster. When the number of attributes ... -
Ideal homogeneous access structures constructed from graphs
(2009)
Article
Open AccessStarting from a new relation between graphs and secret sharing schemes introduced by Xiao, Liu and Zhang, we show a method to construct more general ideal homogeneous access structures. The method has some advantages: it ...
