Abstract
Every year, millions of pupils take part in the baccalaureate examination and the examinations of entrance to Universities or Colleges in Vietnam. It is significantly necessary to keep the secrecy of the questions of these important examinations in order to keep the their fairness and to protect the legal rights of the participants. In this document we exploit the new and very secure cryptographic algorithms, especially the Advanced Encryption Standard, to devise the practical and effective method for the examination security.