Time series analysis of a confidentiality measure for an Encrypted search system

We derive a confidentiality measure against an adversary deploying a known-plaintext attack on the search agents Encrypted searches. We perform a time series analysis on a theoretical adversary in order to derive an estimator of the forecast distribution on the confidentiality measure, which may be used to inform policies such as when and how frequently a password change may be called for to maintain a minimum level of confidentiality.

keywords: time series analysis, known-plaintext attack, encrypted search, confidentiality measure, estimation