  University education play a critical role in shaping intellectual and
professional development of the individuals and contribute significantly to the
advancement of knowledge and society. Generally, university authority has a
direct control of students result making and stores the credential in their
local dedicated server. So, there is chance to alter the credential and also
have a very high possibility to encounter various threats and different
security attacks. To resolve these, we propose a blockchain based secure
credential management system (BCMS) for efficiently storing, managing and
recovering credential without involving the university authority. The proposed
BCMS incorporates a modified two factor encryption (m2FE) technique, a
combination of RSA cryptosystem and a DNA encoding to ensure credential privacy
and an enhanced authentication scheme for teachers and students. Besides, to
reduce size of the cipher credential and its conversion time, we use character
to integer (C2I) table instead of ASCII table. Finally, the experimental result
and analysis of the BCMS illustrate the effectiveness over state of the art
works.
