The author introduces the topic of searching on encrypted data and expresses their excitement about the possibilities it presents. They mention that the problem of encrypted search has become important in the fields of security and cryptography due to the increase in data outsourcing and decreased trust in third parties. The author acknowledges that while the concept of searching on encrypted data may seem impossible, there are many practical and secure ways to achieve it. The author also mentions the history of research in this area and highlights that significant progress has been made. The setup for the discussion is explained, with the client and server interacting in two phases. The author concludes by mentioning the different ways to search on encrypted data based on different cryptographic primitives and promises to explore them further in the series.
https://esl.cs.brown.edu/blog/how-to-search-on-encrypted-data-introduction-part-1/