Using information in-the-world as external memory may be a low-cost alternative to internal memory: storage is free, and retrieval is often quick (involving a saccade) and reliable. However, when the cost of accessing external information increases, in-the-head storage and retrieval may become the least-cost solution. We employ the rational analysis framework (Anderson, 1990) to study the effec...

Given a database, the private information retrieval (PIR) protocol allows a user to make queries to several servers and retrieve a certain item of the database via the feedbacks, without revealing the privacy of the specific item to any single server. Classical models of PIR protocols require that each server stores a whole copy of the database. Recently new PIR models are proposed with coding ...

We study the problem of private function retrieval (PFR) in a distributed storage system. In PFR the user wishes to retrieve a linear combination of M messages stored in noncolluding (N,K) MDS coded databases while revealing no information about the coefficients of the intended linear combination to any of the individual databases. We present an achievable scheme for MDS coded PFR with a rate t...

The amount of data is increasing daily. Data requires storage and effective processing for information retrieval. These both are challenge in case of the BigData due its velocity, variety and volume. It requires different management and efficient information retrieval schemes. There are different techniques available for the management of the Bigdata. The distribution of the storage and the pro...