  Information security is concerned with maintaining the secrecy, reliability
and accessibility of data. The main objective of information security is to
protect information and information system from unauthorized access,
revelation, disruption, alteration, annihilation and use. This paper uses
spatial domain LSB substitution method for information embedding and modified
forms of Arnold transform are applied twice in two different phases to ensure
security. The system is tested and validated against a series of standard
images and the results show that the method is highly secure and provides high
data hiding capacity.
