The goal is to create a blockchain in which all the transactions represent the university exams passed by the students and their grades. Transactions must only be created by authorized personnel. Students read their career history, administrative staff and professors can record and change grades. In a first phase, the student will have to study the blockchain technology, smart contracts, and the Moodle platform. Then the student must choose one of the existing blockchain implementations (ethereum, monero, etc) most suitable to the problem Finally the student will implement and test a web based application and a Moodle plug in to support the functions described.