  Multimedia information availability has increased dramatically with the
advent of mobile devices. but with this availability comes problems of
maintaining the security of information that is displayed in public. Many
approaches have been used or proposed for providing security for information
dissemination over networks, protection system classified with more specific as
encryption information, and combination between video compression and
encryption to increase information security. The strength of the combination
between Video compression and encryption science is due to the nonexistence of
standard algorithms to be used in video compression and encrypting secret video
stream. Also there are many ways could be used in video encryption methods such
as combining several different encryption methods with video compression to
pass a secret video streaming. Furthermore, there is no formal method to be
followed to discover an encrypted video. For this reason, the task of this
paper becomes difficult. In this paper proposed a new system of video
encryption is presented. The proposed system aim to gain a deep understanding
of video data security on multimedia technologies, to investigate how
encryption and decryption could be implemented for real time video
applications, and to enhance the selective encryption for H.264/AVC. The system
includes two main functions; first is the encoding/encryption of video stream,
through the execution of two processes (the input sequences of video is first
compressed by the H.264/AVC encoder, and the encoded bit stream (I-frame) is
partially encrypted using AES block cipher). And the second function is the
decryption/decoding of the encrypted video through two process (specify the
encrypted I-frame stream, decryption of the I-frame, and decoding with
H.264/AVC decoder). The system is implemented by using Matlab.
