We present a private information retrieval (PIR) scheme based on somewhat homomorphic encryption (SWHE). In particular, we customize an NTRU-based SWHE scheme in order to evaluate a specific class of fixed depth circuits relevant for PIR implementation, thus achieving a more practical implementation. In practice, a SWHE that can evaluate a depth 5 circuit is sufficient to construct a PIR capabl...

A popular security problem in database management is how to guarantee to a querying party that the database owner will not learn anything about the data that is retrieved — a problem known as Private Information Retrieval (PIR). While a variety of PIR schemes are known, they are rarely considered for practical use cases yet. We investigate the feasibility of PIR in the telecommunications world ...

BACKGROUND Second-generation antihistamines (AHs) have, in general, fewer sedative effects than the first-generation. However, important inter-drug differences remain in the degree of cognitive and/or psychomotor impairment. The extent to which a particular compound causes disruption can be conveniently compared, to all other AHs, using the Proportional Impairment Ratio (PIR). Although the PIR ...

Postinhibitory rebound (PIR) is believed to play an important role in the genesis and maintenance of biological rhythms. While it has been demonstrated during several in vitro studies, in vivo evidence for PIR remains scarce. Here, we report that PIR can be observed in the dorsomedial entorhinal cortex of anesthetized rats, mostly between putatively connected GABAergic interneurons, and that it...

OBJECTIVE Prone positioning, iterative reconstruction (IR-OSEM) and electrocardiography (ECG) gating have been demonstrated to improve the specificity of myocardial perfusion SPECT (MPS) in the diagnosis of coronary artery disease. METHODS The gated supine and prone MPS images of 45 patients were reconstructed with both IR-OSEM [supine (SIR) and prone (PIR)] FBPs [supine (SFBP), prone (PFBP)]...

The capacity has recently been characterized for the private information retrieval (PIR) problem as well as several of its variants. In every case it is assumed that all the queries are generated by the user simultaneously. Here we consider multiround PIR, where the queries in each round are allowed to depend on the answers received in previous rounds. We show that the capacity of multiround PI...

Private information retrieval for k ≥ 1 databases (denoted by (k, )-PIR for short) is a protocol that (1) a user sends an tuple query to each of k noncommunicating replicated databases; (2) each database responds the user with an answer corresponding to the tuple query; (3) the user privately retrieve any single bit out of the n bits of data stored in k databases. In this model, “privacy” impli...

search for the cup of jamshid from me, years my heart made. and for what it possessed, from a stranger, entreaty made. a jewel that is beyond the shell of existence and of time, from those lost on the shore of the sea, search it made. last night, i took my difficulty to the pir of the magians. who, by strengthening of sight, the solving of sublety made. him, happy, laughing, wine-goblet in hand...

The plant pathogenic bacterium Erwinia chrysanthemi secretes pectate lyase proteins that are important virulence factors attacking the cell walls of plant hosts. Bacterial production of these enzymes is induced by the substrate polypectate-Na (NaPP) and further stimulated by the presence of plant extracts. The bacterial regulator responsible for induction by plant extracts was identified and pu...