aspg-2-536-1791951393 20261014041633 American Scientific Publishing Group admin@americaspg.com American Scientific Publishing Group Journal of Cybersecurity and Information Management JCIM 2769-7851 2690-6775 2020 4 1 Ibeneme-Sabinus Ifeoma Livina Graduate Assistant, Department of Cybersecurity, School of Information and Communication Technology (SICT), Federal University of Technology, Owerri Ekedebe Nnanna Lecturer II, Department of Information Technology, School of Information and Communication Technology (SICT), Federal University of Technology Owerri, Nigeria Nwokonkwo Obi Senior Lecturer, Department of Information Technology, School of Information and Communication Technology (SICT), Federal University of Technology Owerri, Nigeria Ibeneme Sabinus Ikechukwu Senior Lecturer, Department of Geology, School of Physical Sciences (SOPS), Federal University of Technology Owerri, Nigeria Ajah Benjamin Ogonnaya Technologist, Department of Computer Science, Faculty of Natural and Applied Sciences (FNAS), Federal Polytechnic Nekede Owerri, Nigeria Amadi Emmanuel Chukwudi Lecturer I, Department of Information Technology, School of Information and Communication Technology (SICT), Federal University of Technology Owerri, Nigeria A web based user friendly document encryption application software was developed as a better cryptographic online system used in securing important tertiary institutions’ documents such as students' Official Grade Report (OGR) sheets, computed and approved results, transcripts, examination and test question papers, Senate/Council documents and any other sensitive or important document needed to be secured from unauthorized users. It is a known fact that problems like unsecured information, information misuse, tampering of sensitive documents by unauthorized persons, stress of hiding sensitive documents from unauthorized persons and locating hidden sensitive documents exist in any system/unit where proper data security mechanism is not in place. In this research work, an online cryptographic system was designed, using Advanced Encryption Standard (AES) algorithm, to secure important documents. The Analysis and Design of this system followed the Structured System Analysis and Design Methodology (SSADM) using web tools. The output of the software shows that the application can encrypt files and save in the database and can only be decrypted using a cipher key automatically generated by the system. With this software, sensitive information can be easily accessed without stress or fear and it has created a more reliable and safer platform to secure such sensitive documents other than the primitive method of using username and password. 2020 26 35 536 https://creativecommons.org/licenses/by/4.0/ 10.54216/JCIM.040103 https://americaspg.com/journal/2/article/536 https://americaspg.com/storage/8308.pdf