Seems super vulnerable to frequency analysis though. However, if this is a path you might want to go down, you might want to look at CryptDB, a research project

Seems super vulnerable to frequency analysis though. However, if this is a path you might want to go down, you might want to look at CryptDB, a research project that looks at keeping a server side encrypted database and allows for queries in a principled way: http://css.csail.mit.edu/cryptdb/ http://css.csail.mit.edu/cryptdb/