  In this paper, we develop a theoretical model for the adoption process of
Information System Security innovations in organisations. The model stemmed
from the Diffusion of Innovation theory (DOI), the Technology Acceptance Model
(TAM), the Theory of Planned Behaviour (TPB) and the
Technology-Organisation-Environment (TOE) framework. The model portrays
Information System Security adoption process progressing in a sequence of
stages. The study considers the adoption process from the initiation stage
until the acquisition of innovation as an organisational level judgement while
the process of innovation assimilation and integration is assessed in terms of
the user behaviour within the organisation. The model also introduces several
factors that influence the Information System Security innovation adoption. By
merging the organisational adoption and user acceptance of innovation in a
single depiction, this research contributes to IS security literature a more
comprehensive model for IS security adoption in organisation, compare to any of
the past representations.
