RT Conference Proceedings T1 New Security Definitions, Constructions and Applications of Proxy Re-Encryption T2 ERCIM STM 2017 ERCIM STM Ph.D. Award A1 Núñez Montañez, David Alejandro K1 Computación en nube K1 Criptografía (Informática) AB This talk is devoted to proxy re-encryption (PRE), a cryptographic primitive that constitutes a practical solution to the problem of secure data sharing, from the perspective of both functionality and efficiency. Proxy re-encryption is a type of public-key encryption that also allows a proxy entity to transform ciphertexts from one public key to another, without learning anything about the underlying message. From a functional point of view, proxy re-encryption can be seen as a means of securely delegating access to encrypted information, representing therefore a natural candidate to construct cryptographically-enforced access control mechanisms. In addition, this primitive is in itself of great theoretical interest, since its security definitions have to simultaneously balance the security of ciphertexts and the possibility of transforming them through re-encryption, which represents a challenging dichotomy. This talk will follow a transversal approach, ranging from the very definitions of security models for proxy re-encryption to the specifics of applications. YR 2017 FD 2017-09-25 LK http://hdl.handle.net/10630/14518 UL http://hdl.handle.net/10630/14518 LA eng NO ERCIM STM Ph.D. Award NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 24 ene 2026