bitcoin theme as graduation work

[Suspended]

Hi there! I choosed bitcoin as theme for graduation and pre-graduation work, so now I'm trying to determine specific topic for both works. As for couple days ago, I decided make pre-graduation topic something like "analyze for user-level security threats and fix it in official client" - thats mean I was going to add crypt-protection to stored wallet-keys and some other tweaks. But release of new version just already have all these upgrades   
So guys maybe you can suggest some specific theme for me. For pre-graduation work I need some really practical topic like as I described, and for graduation work I need some cryptographic topic and a little practical target. So some parts of network functionality (may be pools?) to approve network security in math terms, and make some adjacent application (like pool-mining server).

I'll be very glad for any proposal guys, and sorry for my english

[Gustavofring]

Sounds interesting. May be a dumb idea but how about a tool for encrypted P2P communication attached to your Bitcoin wallet so you can encrypt messages and send them to other users' wallets? It could make dealings with strangers a lot safer. A combined BTC and GPG, I guess.

[Suspended]

So, what do you think about transfering 10^-8 coins per message and filled comment field crypted with public key?
And guys, may be some more ideas? For graduation work?