Accredited Symmetrically Private Information Retrieval

Abstract. With the digitization of society and the continuous migration of services to the electronic world, individuals have lost significant control over their data. In this paper, we consider the problem of protecting personal information subjects. More specifically, we propose a new primitive allowing a data subject to decide when, how, and by whom his data can be accessed, without the database manager learning anything about his identity, at the time the data is retrieved. The proposed solution, which we call Accredited SPIR, combines symmetrically private information retrieval and privacy-preserving digital credentials. We present three constructions based on the discrete logarithm and RSA problems. Despite the added privacy safeguards, the extra cost incurred by our constructions is negligeable compared to that of the underlying building blocks.

• Type: Conference
• Year: 2007
• Where: IWSEC
• Authors: Mohamed Layouni
• Keywords: Continuous Migration, IWSEC 2007, Personal Information Subjects, Privacy-preserving Digital Credentials, Security Privacy