Information Hiding in Images Using Steganography Techniques Gahizi Emmanuel, Gilbert Gutabaga Hungilo, Jaouja Maiga, Albertus Joko Santoso
Universitas Atma Jaya Yogyakarta
Universitas Atma Jaya Yogyakarta
Universitas Atma Jaya Yogyakarta
Universitas Atma Jaya Yogyakarta
Abstract
In this era of development and increasing use of the
Internet, users are facing security problem during information
sharing in which unauthorized receivers can obtain access to the
information transmitted. Information hiding during the
transmission of information via the internet is one of the
techniques used to keep the secrecy of the information from an
unauthorized/ unintended persons. Steganography is a way of
hiding secret information by inserting it into an audio, video,
image or text file without raising any suspicious to unintended
persons. This paper presents the study which hides text messages
into the image file by using Discrete Cosine Transform (DCT)
steganography approach. This approach works by transforming
the cover image and text message from spatial domain
representation to frequency domain representation and use a
redundant bit of cover image for hiding text message in such a way
that unintended person will continue to see it as a normal image.
The method continues to keep the quality of the cover image which
transfers the information to reduce suspicion. Steganography is
most used in military, law enforcement agency, corporate spies
and in the medical area for hiding sensitive information.
Keywords: Data hiding, Steganography, Cryptography, Discrete Cosine Transform (DCT)
