Generate a public and private key pair for yourself. If you have any problem in installing it properly, please discuss this in the project folder. Publish your public key in your project folder and export your public keys to one or more of the PGP key servers (optional: if you publish your keys there, your email address is public there also, if you feel you do not want to publish your email address there, you can choose not to publish it, you can also generate a key for some email addresses that you do not care about spam and publish the corresponding key there), and post some encrypted message in the project folder (not private email boxes since I cannot check your private email box thus cannot grade it) to each of your project colleagues (you can publish the cipher text in your project folder). If you get some encrypted message for yourself, decrypt it and ask the sender to verify that the message is correct.