International Journal of Engineering Trends and Technology (IJETT) – Volume 33 Number 7- March 2016
Video Encryption and Decryption using RSA
Algorithm
Merlyne Sandra Christina C#1, Karthika M*2, Vasanthi M#3, Vinotha B*4
Assistant professor and Student & Computer Science and Engineering & Anna University
Saranathan College of Engineering, Punjapur, Trichy, Tamil nadu, India.
Abstract―Advance in digital content transmission have
increased in the past few years. Security and privacy
issues of the transmitted data have become an important
concern in multimedia technology. To maintain balance
between computational time and security, proposed RSA
algorithm has been used to selectively encrypt and
decrypt the sensitive video. Using this approach,
unauthorized viewing of the video file can be prevented.
Also this algorithm provides a high level of security.
Multimedia data is transmitted in various fields like
military, commercial, medicine, which generally have
sensitive data. To provide security while transferring the
video over internet, we are using RSA algorithm. A
comparative study of the proposed algorithm with other
existing algorithms has been put forward in this paper to
prove the effectiveness of the proposed algorithm.
Key words— Upload, Encryption, Sending, Receiving,
Decryption.
I.
INTRODUCTION
Many techniques are needed to protect the
shared data. The present work focus on
cryptography to secure the video while transmitting
in the network. Firstly the video which is to be
transmitted from sender to receiver in the network
must be encrypted using the encryption algorithm
in cryptography. Secondly, by using decryption
technique the receiver can view the original video.
Multimedia applications such as Video onDemand, Video broadcast, multimedia mail and
video conferencing must be provided with secure
transmission. Secure video transmission means
transferring or receiving a video with the assurance
that any unapproved eavesdroppers along the way
will not be able to get any information about or
from that video. In that kind
the video will be converted with some highly
secured data. Here we are going to use the art of
Cryptography which
plays the vital role in security. The reverse of data
encryption is data Decryption, which recuperate the
original video. Here we are going to use RSA
algorithm for security. Further explanations will be
followed later in this paper.
ISSN: 2231-5381
II.
RIVEST-SHAMIR-ADLEMAN (RSA)
ALGORITHM
RSA is designed by Ron Rivest, Adi
Shamir, and Leonard Adleman in 1978. It is one of
the best known public key cryptosystems for key
exchange or digital signatures or encryption of
blocks of data. RSA uses a variable size encryption
block and a variable size key. It is an asymmetric
(public key) cryptosystem based on number theory,
which is a block cipher system. It uses two prime
numbers to generate the public and private keys.
These two different keys are used for encryption
and decryption purpose. Sender encrypts the
message using Receiver public key and when the
message gets transmit to receiver, receiver can
decrypt it using his own private key [12, 13]. RSA
operations can be decomposed in three broad steps;
key generation, encryption and decryption. When
the small values of p & q are selected for the
designing of key then the encryption process
becomes too weak and one can be able to decrypt
the data by using random probability theory and
side channel attacks. On the other hand if large p &
q lengths are selected then it consumes more time
and the performance gets degraded in comparison
with DES. In order to overcome these drawbacks,
we are using paging technique which improves the
speed of encryption and decryption without
degrading the performance of the system.
1. Choose two distinct large random prime
numbers p & q
such that p ≠ q.
2. Compute n= p × q.
3. Calculate: phi (n) = (p-1) (q-1).
4. Choose an integer e such that 1<e<phi(n)
5. Compute d to satisfy the congruence relation d ×
e = 1 mod phi (n); d is kept as private key
exponent.
6. The public key is (n, e) and the private key is (n,
d).
Keep all the values d, p, q and phi secret.
3.1.2 Encryption
Plaintext: P < n
Ciphertext: C= Pe mod n.
3.1.3 Decryption
Ciphertext: C
Plaintext: P=Cd mod n.
http://www.ijettjournal.org
Page 328
International Journal of Engineering Trends and Technology (IJETT) – Volume 33 Number 7- March 2016
III.
EXISTING SYSTEM
Table I: Comparative Study of Existing and
Proposed System
Factors
Created by
Key length
Rounds
Block size
Speed
Security
Algorithm
Power
consumption
Deposit
of
keys
Stimulation
speed
Trojan Horse
Ciphering and
Deciphering
algorithm,
Key exchange
RSA(Paging)
Ron
Rivest,
Adi Shamir &
Leonard
Adelmen
Depends
on
number
of
bytes in the
modules
1
DES
IBM
Variable
Fast
Excellent
Asymmetric
Medium
64 bits
Slow
Medium
Symmetric
low
10 or 12 or
14
128 bits
Fast
High
Symmetric
Medium
Needed
Needed
Needed
Faster
Faster
Faster
No
Same
No
Different
Not proved
Different
Not needed
Needed
Needed
56 bits
16
AES
Vincent
Rijmen,
Joan
Daemen
128,192 or
256 bits
A. Disadvantages in existing system
Number of rounds in other existing system
is more than proposed system.
Process speed is lower in DES when
compared with RSA.
Need of memory space to deposit the keys
used in AES and DES.
Level of security of all the existing system
is lower than proposed system.
Encryption and decryption process in
existing system is difficult.
IV.
been proposed in the literature and some have been
used in real products. Achieving an efficiency,
flexibility and security is a challenge of researcher.
So we are using RSA algorithm to encrypt and
decrypt the video. RSA is one of the first practical
public-key cryptosystems and is widely used for
secure data transmission. In such a cryptosystem,
the encryption key is public and differs from the
decryption key which is kept secret. In RSA, this
asymmetry is based on the practical difficulty of
factoring the product of two large prime numbers,
the factoring problem. RSA is made of the initial
letters of the surnames of Ron Rivest, Adi Shamir,
and Leonard Adleman, who first publicly described
the algorithm in 1978.In RSA algorithm
asymmetric key is used whereas all other algorithm
uses symmetric key. Since it used asymmetric key,
there will be no way to hack the original video. If
any person try to hack the video, it will be open as
encrypted video. So the transaction will be highly
secured. The video will be converted into several
bytes. Then it will be encrypted using public key.
After encrypting the encrypted video will be in the
form of text. Then it will be send to the receiver
using FTP (File Transfer Protocol). The receiver
will receive the encrypted video and decrypt it by
using private key. Here there is no need to
exchange the key. Because receiver can compute
their own private key.Separating audio and video
track is quite complicated. So we are directly
encrypt and decrypt the video without any
separation. To speed up the encryption and
decryption process Paging technique is used. In
paging ,the video will be divided into several
number of units .Then we apply RSA algorithm to
each unit in order to encrypt. And the encrypted
video of each unit will be saved in a text file
concurrently.
PROPOSED SYSTEM
With the rapid development of various
multimedia technologies, more and more
multimedia data are generated and transmitted in
the medical, commercial, and military fields, which
may include some sensitive information which
should not be accessed by or can only be partially
exposed to the general users. Therefore, security
and privacy has become an important. Over the last
few years several encryption algorithms have
applied to secure video transmission. While a large
number of multimedia encryption schemes have
ISSN: 2231-5381
Fig. 1: Overall diagram of video encryption and decryption
http://www.ijettjournal.org
Page 329
International Journal of Engineering Trends and Technology (IJETT) – Volume 33 Number 7- March 2016
B. Advantages in proposed system
Fig. 2: Intruder Interruption
Intruder may try to hake the video. But
only the encrypted video will open. Original video
will not be open.
Number of rounds in proposed system is
very less.
Process speed of RSA is very high.
Need not require memory space to deposit
the keys used in proposed system.
Level of security of proposed system is
excellent.
Encryption and decryption process in
proposed system is easy to execute.
C. Modules involved
1) Upload: This system will accept any type
of video. The selected video path will be
shown in the encryption phase. The
uploaded video will then be converted into
bytes and then send for encryption.
Fig. 3: Architecture diagram of proposed system
A. Activity Diagram
Fig. 5: Uploading video
2) Encryption: In encryption the converted
bytes of video will be used for applying
RSA algorithm. After applying RSA
algorithm the original video will be
converted into an unreadable form called
as encrypted video. Paging technique is
used in our project. This technique will
divide the video into number of units.
After that encryption will be done for
individual unit. Encrypted video of each
unit will be of 128 bytes.
Fig. 4: Activity diagram
ISSN: 2231-5381
http://www.ijettjournal.org
Page 330
International Journal of Engineering Trends and Technology (IJETT) – Volume 33 Number 7- March 2016
Fig. 6: Encryption process
3) Sending: After completing encryption the
encrypted video is send to the destination
by giving their corresponding IP address.
This will be done by making use of File
Transfer Protocol (FTP). Destination can
be one or more than one people.
Fig. 7: Sending video
4) Decryption: In the decryption phase the
encrypted video will be received to the
receiver. Receiver may or may not accept
the incoming encrypted video. If the
receiver accepted the video then he/she
can decrypt the video easily by just
clicking the decrypt button. If the receiver
does not accept then the transaction will
be failed and will show an error message
at the sender side.
Fig. 9: Saving video
V.
CONCLUSION
Encryption algorithm plays very important
role in communication security. Six modules are
made, each for a specific purpose and will be
interlinked to each other. Encryption and
decryption modules are the main modules,
converting video into the text form and send to the
receiver. In decryption, again converting it into the
original video. Our project can be used in any field
to maintain the secure transaction. The very big
advantage of our project is security. But it depends
on the size of the prime. If high security is needed,
we have to use big prime numbers.
ACKNOWLEDGEMENT
We are thankful and would like to express
our sincere gratitude for our Head of the
DepartmentMr. S Venkatasubramanian and
oursupervisor Mrs. CMerlyne Sandra Christina for
the
guidance,
support
and
continuous
encouragement
in
making
this
project
possible.Their guidance from initial to final level
enabled us to achieve our objective of final year
project. Our sincere thanks to all the Lecturers who
helped us in many ways, gave valuable advises and
made our journey easy.
REFERENCES
Fig. 8: Decryption process
5) Save: This module is used to save the
incoming encrypted video in the system
and also for saving the decrypted
(original) video in the desired location.
ISSN: 2231-5381
[1] A Secure Dual Encryption Scheme Combined with
Steganography
A Aswathy Nair#1, Deepu Job#2: # 1 PG Scholar, # 2Assistant
Professor- International Journal of Engineering Trends and
Technology (IJETT) – Volume 13 Number 5 – Jul 2014
[2] International Journal of Computer Applications (0975 –
8887) Volume 65– No. 4). Securing Video Data: A Critical
Review Akansha Agrawal1, Virendra Singh2 M. Tech Research
Scholar, Department of Computer Science, Indore Institute of
Science and Technology-II, Indore, India. Assistant Professor,
http://www.ijettjournal.org
Page 331
International Journal of Engineering Trends and Technology (IJETT) – Volume 33 Number 7- March 2016
Department of Computer Science, Indore Institute of Science
and Technology-II, Indore, India2. 1, March 2013
[3] A Real-time MPEG Video Encryption Algorithm using AESJayshriNehete K. Bhagyalakshmi, M. B. Manjunath,
ShashikantChaudhari, T. R. Ramamohan. Central Research
Laboratory
[4] An Overview of Video Encryption Techniques -M.
Abomhara, Omar Zakaria, Othman O. Khalifa. International
Journal of Computer Theory and Engineering, Vol. 2, No. 1
February, 2010
[5] Dual-Layer Video Encryption using RSA AlgorithmAmanChadha, SushmitMallik, AnkitChadha, RavdeepJohar, M.
Mani Roja. International Journal of Computer Applications
(0975 – 8887) Volume 116 – No. 1, April 2015.
[6] A Study Based on the Video Encryption Technique -Saurabh
Sharma#1, Pushpendra Kumar Pateriya*2, Lakshmi#3.
#1M.tech Student, *2Assistant Professor, #3M.Tech Student .
Department of Computer Science Engineering . Lovely
Professional University, Phagwara, India
[7] Proposed Video Encryption Algorithm v/s Other Existing
Algorithms:
A
Comparative
Study.
Ajay
Kulkarni,SaurabhKulkarni,KetkiHaridas,
Aniket.Vidyalankar
Inst. Of Tech. Mumbai.
[8] ”Data Security in Cloud Computing using RSA Algorithm”.
- KalpanaParsi, SingarajuSudha. International Journal of
Research in Computer and Communication technology,
IJRCCT, ISSN 22785841, Vol 1, Issue 4, September 2012. pp.
145.
[9] "Research and Implementation of RSA Algorithm for
Encryption and Decryption", - Xin Zhou and Xiaofei Tang. The
6th International Forum on Strategic Technology, pp. 1118 –
1121, 2011.8
[10] A Study of Encryption Algorithms (RSA, DES, 3DES
andAES) for Information Security -1Gurpreet Singh M.Tech
Research Scholar, Department of Computer Science and
Engineering ,Sri Guru Granth Sahib World University,
Fatehgarh Sahib, Punjab, India. 2Supriya Assistant Professor,
Department of Computer Science and Engineering , Sri Guru
Granth Sahib World University, Fatehgarh Sahib, Punjab,
India.
[11] New Comparative Study Between DES, 3DES and AES
within Nine Factors
Hamdan.O.Alanazi, B.B.Zaidan,
A.A.Zaidan, Hamid A.Jalab, M.Shabbir and Y.Al-Nabhani
ISSN: 2231-5381
http://www.ijettjournal.org
Page 332