Evaluation of a Fast Symmetric Cryptographic Algorithm Based on the Chaos Theory for Wireless Sensor Networks

2012 ◽  
Author(s):  
Ismail Mansour ◽  
Gerard Chalhoub ◽  
Bassem Bakhache
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Chaos Theory ◽  
Wireless Sensor ◽  
Cryptographic Algorithm

scholarly journals Implementing RSA for Wireless Sensor Nodes

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2864 ◽  
Author(s):  
Utku Gulen ◽  
Abdelrahman Alkhodary ◽  
Selcuk Baktir
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Public Key Cryptography ◽  
Sensor Nodes ◽  
Public Key ◽  
Wireless Sensor ◽  
Acceleration Techniques ◽  
Cryptographic Algorithm ◽  
Window Method ◽  
Encryption And Decryption

As wireless sensor networks (WSNs) become more widespread, potential attacks against them also increase and applying cryptography becomes inevitable to make secure WSN nodes. WSN nodes typically contain only a constrained microcontroller, such as MSP430, Atmega, etc., and running public key cryptography on these constrained devices is considered a challenge. Since WSN nodes are spread around in the field, the distribution of the shared private key, which is used in a symmetric key cryptographic algorithm for securing communications, is a problem. Thus, it is necessary to use public key cryptography to effectively solve the key distribution problem. The RSA cryptosystem, which requires at least a 1024-bit key, is the most widely used public key cryptographic algorithm. However, its large key size is considered a drawback for resource constrained microcontrollers. On the other hand, RSA allows for extremely fast digital signature generation which may make it desirable in applications where messages transmitted by sensor nodes need to be authenticated. Furthermore, for compatibility with an existing communication infrastructure, it may be desirable to adopt RSA in a WSN setting. With this work, we show that, in spite of its long key size, RSA is applicable for wireless sensor networks when optimized arithmetic, low-level coding and some acceleration algorithms are used. We pick three versions of the MSP430 microcontroller, which is used widely on wireless sensor network nodes, and implement 1024-bit RSA on them. Our implementation achieves 1024-bit RSA encryption and decryption operations on MSP430 in only 0 . 047 s and 1 . 14 s, respectively. In order to achieve these timings, we utilize several acceleration techniques, such as the subtractive Karatsuba-Ofman, Montgomery multiplication, operand scanning, Chinese remainder theorem and sliding window method. To the best of our knowledge, our timings for 1024-bit RSA encryption and decryption operations are the fastest reported timings in the literature for the MSP430 microcontroller.

scholarly journals Developing and Evaluation of New Hybrid Encryption Algorithms

2014 ◽  
Vol 13 (1) ◽  
pp. 4038-4052
Author(s):  
DiaaSalama AbdElminaam ◽  
Hatem M. Abdul Kader ◽  
Mohie M. Hadhoud ◽  
Salah M El-Sayed
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Data Encryption ◽  
Wireless Sensor ◽  
Symmetric Encryption ◽  
Hybrid Encryption ◽  
Cryptographic Algorithm ◽  
Encryption Algorithms ◽  
Asymmetric Encryption ◽  
Cryptographic Techniques

Wireless Sensor networks consist of hundreds or thousands of low cost, low power and self-organizing nodes which are highly distributed. As wireless sensor networks continue to grow, so does the need for effective security mechanisms because sensor networks may interact with sensitive data. Encryption algorithms play good roles in information security systems (ISS). Those algorithms consume a significant amount of computing resources such as battery power. Wireless Sensor networks are powered by a battery which is a very limited resource. At present, various types of cryptographic algorithms provide high security to information on networks, but there are also has some drawbacks.  The present asymmetric encryption methods and symmetric encryption methods can offer the security levels but with many limitations. For instance key maintenance is a great problem faced in symmetric encryption methods and less security level is the problem of asymmetric encryption methods even though key maintenance is easy. To improve the strength of these algorithms, we propose a new hybrid cryptographic algorithm in this paper. The algorithm is designed using combination of two symmetric cryptographic techniques and two Asymmetric cryptographic techniques. This protocol provides three cryptographic primitives, integrity, confidentiality and authentication. It is a hybrid encryption method where elliptical curve cryptography (ECC) and advanced encryption (AES) are combined to provide node encryption. RSA algorithm and Blowfish are combined to provide authentication and (MD5) for integrity. The results show that the proposed hybrid cryptographic algorithm gives better performance in terms of computation time and the size of cipher text.This paper tries to present a fair comparison between the new protocols with four existing different hybrid protocols according to power consumption. A comparison has been conducted for those protocols at different settings for each protocol such as different sizes of data blocks, and finally encryption/decryption speed. Experimental results are given to demonstrate the effectiveness of each algorithm.

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