VLSI Implementation of Hybrid Cryptography Algorithm Using LFSR Key
Shailaja Acholli, Krishnamurthy Gorappa Ningappa · International journal of intelligent engineering and systems · 2019
The security and confidentiality of the information has become a significant factor in the communication field.Several techniques for encryption and decryption are proposed to promote the security of the communication systems.Most powerful and significant part of the encryption is a key generation.Presently, hackers are able to break the key with help of the modern high computing machines.In this research, hybrid cryptographic algorithm -Extended Tiny Encryption Algorithm (XTEA) combined with International Data Encryption Algorithm (IDEA) was implemented for improving the security in real-time applications.A large key size ensures the randomness, but proportionally maximizes the network load with high complexity.To overcome this problem, the random numbers were generated using a Linear Feedback Shift Register (LFSR) scheme for key function.This algorithm was appropriate for encryption and decryption of online streaming data.The proposed method is named as International Data -Extended Tiny based Encryption Algorithm -LFSR (ID-XT-EA-LFSR) method.The ID-XT-EA-LFSR method improves the FPGA performances up to 50.43% compared to the QTL, DROM-CSLA-QTL and XTEA algorithms.