With the increase of wireless LAN usage in homes and enterprises due to its numerous benefits,
authenticating the ever increasing number of devices and their users has become a challenge to
proprietors of such kind networks. A MAC address, a physical network address that is used as basis for this
study, has a copy of its value in the system software that can be spoofed and altered rendering the address
not unique, not secure and unreliable. On the contrary, a computer’s serial number is hard-coded in the
system hardware only and therefore cannot be spoofed and altered making it unique, secure and reliable.
The research, therefore, was aimed at designing a model that demonstrates how a computer’s serial
number can be used for authenticating a computer in a wireless local area network. In order to achieve
the research objective, the study examined the inbuilt access and use of a computer’s serial number
prototype model as an alternative method of authenticating devices in a network. Design science research
methodology that involved design and development, demonstration and model evaluation was employed. A
Serial Number Based Authentication prototype (SNAP) was therefore designed using state chart and flow
chart diagrams based on dynamic programming, developed over evolutionary prototyping and test run on
a static experimental design using Java Development Kit and MySQL platforms to demonstrate, as proof of
concept, that a computer’s serial number can be used to authenticate a computer in a wireless local area
network. From the test runs whose outcomes were the binary values yes or no, it was found out that SNAP
can actually allow or deny, enable or disable a computer in a network based on the computer’s serial
number. The researcher therefore, recommends that the prototype be scaled up, then adopted as a network
device authentication method