Browsing by Author "Herranz Sotoca, Javier"
Now showing items 1-20 of 40
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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 ... -
Attacking pairing-free attribute-based encryption schemes
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Article
Open AccessCombining several results that have been published in the last years, it is known that it is impossible to design simple and secure attribute-based encryption schemes that work in (classical) settings like the RSA or the ... -
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 ... -
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, ... -
CAL-A: Examen FQ: primavera 2019
(Universitat Politècnica de Catalunya, 2019-06-07)
Exam
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CAL-A: Examen MQ: primavera 2019
(Universitat Politècnica de Catalunya, 2019-03-25)
Exam
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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 ... -
CODES AND CRYPTOGRAPHY
(Universitat Politècnica de Catalunya, 2016-01-08)
Exam
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CODES AND CRYPTOGRAPHY
(Universitat Politècnica de Catalunya, 2016-12-22)
Exam
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CODES AND CRYPTOGRAPHY
(Universitat Politècnica de Catalunya, 2016-11-02)
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CODES AND CRYPTOGRAPHY
(Universitat Politècnica de Catalunya, 2015-01-09)
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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