You can start by checking out the "zerocoin" branch of https://github.com/Anoncoin/anoncoin and looking in src/libzerocoin . Try reading Tutorial.cpp to get an overall feel for how zerocoin works, then move on to understanding the rest of it. Most of that code was not written by me, by the way.

We will need to integrate libzerocoin with Anoncoin:

• loading and saving zerocoins
• pushing zerocoins into another wallet file (creating a new one if doesn't exist), and pulling them from another wallet file
• updating the protocol
• updating the blockchain format (both network and on disk)
• the Qt GUI

Also join #anoncoin on either Freenode or Irc2P (preferred). I'm there more frequently than here.