40. The system of claim 39 , wherein said controller is further to transform said input text by: non-deterministically transforming the input text using a second key to produce a non-deterministically transformed text; and combining the at least one deterministically transformed search term and the non-deterministically transformed text using a logical disjunction operator to obtain a combined processed text, wherein said controller is configured to transmit the processed input text to the server by transmitting the combined processed text to the server.
39. The system of claim 32 , wherein said input text is a search query including at least one search term, wherein said controller is configured to transform said input text by deterministically transforming said at least one search term using a first key to produce a respective at least one deterministically transformed search term, and wherein said controller is further to transmit the processed input text to the server by transmitting the at least one deterministically transformed search term to the server.