A Hybrid Encryption Algorithm for Security Enhancement of Wireless Sensor Networks:A Supervisory Approach to Pipelines

Transmission pipelines are vulnerable to various accidents and acts of vandalism.Therefore,a reliable monitoring system is needed to secure the transmission pipelines.A wireless sensor network is a wireless network consisting of distributed devices distributed at various distances,which monitors the physical and environmental conditions using sensors.Wireless sensor networks have many uses,including the built-in sensor on the outside of the pipeline or installed to support bridge structures,robotics,healthcare,environmental monitoring,etc.Wireless Sensor networks could be used to monitor the temperature,pressure,leak detection and sabotage of transmission lines.Wireless sensor networks are vulnerable to various attacks.Cryptographic algorithms have a good role in information security for wireless sensor networks.Now,various types of cryptographic algorithms provide security in networks,but there are still some problems.In this research,to improve the power of these algorithms,a new hybrid encryption algorithm for monitoring energy transmission lines and increasing the security of wireless sensor networks is proposed.The proposed hybrid encryption algorithm provides the security and timely transmission of data in wireless sensor networks to monitor the transmission pipelines.The proposed algorithm fulfills three principles of cryptography:integrity,confidentiality and authentication.The details of the algorithm and basic concepts are presented in such a way that the algorithm can be operational.

Security Analysis and Enhanced Design of a Dynamic Block Cipher

There are a lot of security issues in block cipher algorithm.Security analysis and enhanced design of a dynamic block cipher was proposed.Firstly,the safety of ciphertext was enhanced based on confusion substitution of S-box,thus disordering the internal structure of data blocks by four steps of matrix transformation.Then,the diffusivity of ciphertext was obtained by cyclic displacement of bytes using column ambiguity function.The dynamic key was finally generated by using LFSR,which improved the stochastic characters of secret key in each of round of iteration.The safety performance of proposed algorithm was analyzed by simulation test.The results showed the proposed algorithm has a little effect on the speed of encryption and decryption while enhancing the security.Meanwhile,the proposed algorithm has highly scalability,the dimension of S-box and the number of register can be dynamically extended according to the security requirement.

AN ACCURATE PREDICTION MODEL FOR COMPUTATIONAL OVERHEADS OF SECURITY MECHANISMS IN WIRELESS SENSOR NETWORKS

In Wireless Sensor Networks (WSNs), it is necessary to predict computational overheads of security mechanisms without final implementations to provide guidelines for system design. This paper presents an accurate and flexible model to predict overheads of these mechanisms. This model is based on overheads of basic operations frequently used in cryptography algorithms, which are essential elements of security mechanisms. Several popular cryptography algorithms and security mechanisms are evaluated using this model. According to simulation results, relative prediction errors are less than 7% for most cryptography algorithms and security mechanisms.