Hybrid Encryption Model of AES and ElGamal Cryptosystems for Flight Control Systems

Computer networks and internet application are growing fast, so data security is the challenging issue of today that touches many areas (particularly in aviation). To prevent unauthorized access to the user data or database, any transmitting process should be securely encrypted. Aviation is critical area and its criticality amplifies by strong communication between both on ground and in motion objects. The goals of this paper are: (1) To introduce new hybrid cryptographic algorithm model using combination of two cryptographic algorithms AES and ElGamal; (2) Provide comparison between two symmetric, asymmetric algorithms and new hybrid model; (3) To show an effectiveness and security of new hybrid model which makes the algorithm strong against vulnerabilities. Currently many encryption algorithms are available to secure the data but some algorithms consume lot of computing resources such as memory and CPU time. This paper shows comparative analysis experimental results on those encryption algorithms. The objective of this research is to evaluate the performance of AES, ElGamal cryptography algorithms and AES&ElGamal hybrid cryptography algorithm. The performance of the implemented encryption algorithms is evaluated by means of encryption and decryption time and memory usage. To make comparison experiments, for those algorithms special software was created. The programming language Java is used for implementing the encryption algorithms. As a result, paper shows that new hybrid encryption model is more secure and strong compared to previous cryptography models and it can be used for flight control systems security.