In a private information retrieval (PIR) system, the user needs to retrieve one of possible messages from set storage servers, but wishes keep identity requested message any given server. Existing efforts in this area have made it clear that efficiency will be impacted significantly by amount space allowed at servers. work, we consider tradeoff between cost and cost. We first present three fund...

A Markov model is proposed to measure storage loss and retrieval failure in retroactive inhibition. This model generalizes Batchelder and Riefer's (1986) storage-retrieval model to account for retroactive inhibition. Storage loss is assumed to result in a disintegration of clustered items, while retrieval failure is assumed to prevent access to clustered items. The model is tested against data ...