Data security has become very important nowadays, especially with the increase of data from the big data, forcing each sector to review its security system. The security of driving license and the vehicle registration is always attributed to an authority. This authority can be public or private. In Cameroon, in the transport sector, the security of the driving license and the vehicle registration document is attributed to two private authorities. Presprint Pl for the driving license and High Tech Telesoft for the vehicle registration card. Their objective is to prove the authenticity, availability and confidentiality of the holder of the driving license or car registration card. But until now, the security of these transport documents has encountered certains problems such as the fact that some individuals possess false driver's licenses or false vehicle registration cards. Sometimes with the complicity of certain system managers, the time taken by an applicant to obtain his driver's license or vehicle registration card, the management of the data to be secured by a single authority. Faced with this situation, in order to ensure that only qualified persons who have received appropriate driver training and hold a authentic driving license can be authorized to drive vehicles. The security of the system will be optimized through the use of blockchain technology, in allowing transparency in data management and without a central authority.