International Journal of Computing Science and Information Technology (IJCSIT)
In today's Internet world, Web search engines such as Google, Yahoo, Microsoft Live Search, etc. are widely used to find certain information from a huge database in a minimum amount of time and with minimum effort. However, all these search engines also pose a privacy threat to the user. In order to address this privacy threat, the authors have proposed User customizable Privacy-preserving Search (UPS) approach. In this survey paper, they have briefly described the working of UPS with its possible challenges. In this paper, they have discussed single database PIR protocol, private Web search and privacy enhanced PWS with their advantages and limitations.