Chapter 9: Crypto Search Engine

This chapter will discuss the technique of searching in encrypted data and provide some basic information on search engines in general and the math behind them. Then we will discover an innovative search engine that is able to work with encrypted data: the Crypto Search Engine (CSE).

This invention was projected and developed by Cryptolab, https://www.cryptolab.us/, a cybersecurity company active in data privacy and protection, founded in 2012 as a cryptography laboratory by me and my co-founders, two data science engineers, Alessandro Passerini and Tiziana Landi. The aim of Cryptolab is to give more privacy and security to the data transmitted and processed over the internet and then stored and shared in the cloud. Another website you can refer to is the web page of CSE: https://www.cryptolab.cloud/.

We are going to talk about homomorphic encryption and, in particular, homomorphic searching, which is one of the most fascinating problems I have...