In this project, a P2P file sharing software similar to BitTorrent is implemented in Java. BitTorrent is a popular P2P protocol for file distribution. Among its interesting features, choking-unchoking mechanism which is one of the most important features of BitTorrent. In the Protocol Description pdf file, you can read the protocol description, which has been modified a little bit from the original BitTorrent protocol. After reading the protocol description carefully, you can follow the implementation specifics shown in the Implementation Specifics section.

To run the project, prerequisite is the following:

• Login to the remote machine, copy the source coded, and compile the code: "javac PeerProcess.java".
• To run PeerProcces in the remote machines, we wrote a wrapper. So if we start the wrapper, all the processes will be started in the remote machines.
• To connect to the remote machines via our local machines, we need to first generate the keys.

Follow the below to generate the keys:

1. Run "ssh-keygen" - it will prompt for file name and passphrase, please don't have a passphrase.
2. Run "ssh-copy-id -i <your_key> @<remote_machine>" - Copy the key to one of your remote machines.

• Login to all the remote machines using this key once before you start the wrapper using "ssh -i <your_key> @<remote_machine>". This will avoid the fingerprint prompt message once you start the wrapper.
• Copy the Common.config file, PeerInfo.config file and the actual file to be transferred in the corresponding peer directories under the folder "project/".
• In the Ssh wrapper file, please change the username to yours, projPath to where you run the program and 'pubKey' to your generated rsakey.
• To start the wrapper compile the Ssh.java program - "javac Ssh.java", and run the wrapper - "java Ssh".