Author, as appears in the article.: Qin B; Deng H; Wu Q; Domingo-Ferrer J; Naccache D; Zhou Y

Department: Enginyeria Informàtica i Matemàtiques

URV's Author/s: Domingo Ferrer, Josep

Keywords: Privacy Cryptography

Abstract: In e-healthcare record systems (EHRS), attribute-based encryption (ABE) appears as a natural way to achieve fine-grained access control on health records. Some proposals exploit key-policy ABE (KP-ABE) to protect privacy in such a way that all users are associated with specific access policies and only the ciphertexts matching the users¿ access policies can be decrypted. An issue with KP-ABE is that it requires an a priori formulation of access policies during key generation, which is not always practicable in EHRS because the policies to access health records are sometimes determined after key generation. In this paper, we revisit KP-ABE and propose a dynamic ABE paradigm, referred to as access policy redefinable ABE (APR-ABE). To address the above issue, APR-ABE allows users to redefine their access policies and delegate keys for the redefined ones; hence, a priori precise policies are no longer mandatory. We construct an APR-ABE scheme with short ciphertexts and prove its full security in the standard model under several static assumptions.

Thematic Areas: Software Safety, risk, reliability and quality Matemática / probabilidade e estatística Information systems Engenharias iv Computer science, theory & methods Computer science, software engineering Computer science, information systems Computer networks and communications Ciência da computação

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 16155262

Author's mail: josep.domingo@urv.cat

Author identifier: 0000-0001-7213-4962

Record's date: 2023-02-18

Papper version: info:eu-repo/semantics/submittedVersion

Link to the original source: https://link.springer.com/article/10.1007%2Fs10207-014-0272-7

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: International Journal Of Information Security. 14 (6): 499-511

APA: Qin B; Deng H; Wu Q; Domingo-Ferrer J; Naccache D; Zhou Y (2015). Flexible attribute-based encryption applicable to secure e-healthcare records. International Journal Of Information Security, 14(6), 499-511. DOI: 10.1007/s10207-014-0272-7

Article's DOI: 10.1007/s10207-014-0272-7

Entity: Universitat Rovira i Virgili

Journal publication year: 2015

Publication Type: Journal Publications