17-03-2014, 01:02 PM
Enhancing Selective Encryption Algorithm for Secured MANET
[attachment=60133]
Abstract
Mobile Ad hoc Network (MANET) technology is
spreading widely these days because of its independence from
fixed infrastructure. For MANET, possessing highly limited
resources, Symmetric key algorithms are more efficient and
viable as compared to asymmetric key algorithms while
transmitting messages via network due to less power
consumption. Due to technological advancement MANET is
getting more and more accessible to common man, but the
most alarming challenge that MANET is facing is the security
issue. In this paper we introduce an enhanced approach of
selective encryption algorithm for achieving better data
protection. First we are giving an overview of selective
encryption algorithm, and proposing an enhanced selective
encryption algorithm based on symmetric key. By
implementing the proposed method, the process of message
encryption can be made more uncertain and overhead may be
reduced, thereby making the encryption procedure more
efficient. We will carry out a set of simulation experiments on
ns2 simulator in future to validate our proposed method.
INTRODUCTION
The formal definition of cryptography says the art of
protecting information by transforming it (encrypting it) into
an unreadable format called as cipher text. Only those who
possess a secret key can decipher (decrypt) the message into
plain text. Encrypted messages can be broken by
cryptanalysis also called as code breaking although modern
cryptography techniques are virtually unbreakable. For
encryption of data, cryptography employs two styles
symmetrical and asymmetrical encryption.
The keys are same for both encryption and decryption
process in symmetric algorithm while they are different in
asymmetric algorithms. Symmetric encryption, also known
as secret key encryption, is the oldest and best-known
technique for data protection. A secret key, which can be a
number, a word, or just a string of random letters, is applied
to the text of a message to change the content in a particular
way. This might be as simple as shifting each letter by a
number of places in the alphabet. As long as both sender and
recipient know the secret key, they can encrypt and decrypt
all messages that use this key.
PROPOSED SELECTIVE ENCRYPTION ALGORITHM FOR
TEXT MESSAGES
In this section, we will explain the proposed selective
encryption algorithm step by step. Our emphasis will be on
improving the encryption process in terms of processing time
and security. Our main aim is not only to send data on the
wireless network from one node to another, but also to
secure the data from hackers. In ad hoc networks all nodes
are capable of performing all tasks on their own. Generally
the links between the wireless nodes are always
bidirectional.
CONCLUSIONS
Nowadays wireless network demand a secure method for
data transmission. This paper provides an enhanced approach
of selective encryption algorithm for text data transfer via
MANET. The approach provides the advantages of selective
encryption by encrypting only those data that are sensitive,
and must be encoded and sending the less sensitive data as it
is. As a result the overhead of whole process is reduced, and
security of data is ensured, by providing a reliable model for
data transmission. The proposed algorithm will be
implemented in ns2 simulator and will be compared with
other methods of data encryption.
[attachment=60133]
Abstract
Mobile Ad hoc Network (MANET) technology is
spreading widely these days because of its independence from
fixed infrastructure. For MANET, possessing highly limited
resources, Symmetric key algorithms are more efficient and
viable as compared to asymmetric key algorithms while
transmitting messages via network due to less power
consumption. Due to technological advancement MANET is
getting more and more accessible to common man, but the
most alarming challenge that MANET is facing is the security
issue. In this paper we introduce an enhanced approach of
selective encryption algorithm for achieving better data
protection. First we are giving an overview of selective
encryption algorithm, and proposing an enhanced selective
encryption algorithm based on symmetric key. By
implementing the proposed method, the process of message
encryption can be made more uncertain and overhead may be
reduced, thereby making the encryption procedure more
efficient. We will carry out a set of simulation experiments on
ns2 simulator in future to validate our proposed method.
INTRODUCTION
The formal definition of cryptography says the art of
protecting information by transforming it (encrypting it) into
an unreadable format called as cipher text. Only those who
possess a secret key can decipher (decrypt) the message into
plain text. Encrypted messages can be broken by
cryptanalysis also called as code breaking although modern
cryptography techniques are virtually unbreakable. For
encryption of data, cryptography employs two styles
symmetrical and asymmetrical encryption.
The keys are same for both encryption and decryption
process in symmetric algorithm while they are different in
asymmetric algorithms. Symmetric encryption, also known
as secret key encryption, is the oldest and best-known
technique for data protection. A secret key, which can be a
number, a word, or just a string of random letters, is applied
to the text of a message to change the content in a particular
way. This might be as simple as shifting each letter by a
number of places in the alphabet. As long as both sender and
recipient know the secret key, they can encrypt and decrypt
all messages that use this key.
PROPOSED SELECTIVE ENCRYPTION ALGORITHM FOR
TEXT MESSAGES
In this section, we will explain the proposed selective
encryption algorithm step by step. Our emphasis will be on
improving the encryption process in terms of processing time
and security. Our main aim is not only to send data on the
wireless network from one node to another, but also to
secure the data from hackers. In ad hoc networks all nodes
are capable of performing all tasks on their own. Generally
the links between the wireless nodes are always
bidirectional.
CONCLUSIONS
Nowadays wireless network demand a secure method for
data transmission. This paper provides an enhanced approach
of selective encryption algorithm for text data transfer via
MANET. The approach provides the advantages of selective
encryption by encrypting only those data that are sensitive,
and must be encoded and sending the less sensitive data as it
is. As a result the overhead of whole process is reduced, and
security of data is ensured, by providing a reliable model for
data transmission. The proposed algorithm will be
implemented in ns2 simulator and will be compared with
other methods of data encryption.