At the moment the way searching works is by searching the database for the text you entered. Each entry is stored in an encrypted format in the database until viewed and is then only decrypted temporarily. To search encrypted entries as well would require that each encrypted entry is decrypted for each search which could be a time consuming operation depending on the size of your wiki. I will consider allowing this for a future version but it may prove to work too slowly with the current implementation of encryption.
Apps On The Move