Efficient Key Mechanisms in Multi-node Network for Secured Data Transmission

*Thapar University, Patiala, India **GNDU, Amritsar, India Ex-Principal, MIMIT, Malout, India Abstract: Cryptography is a technique used to avoid unauthorized access of data. It is the technique of scrambling data to make it indecipherable to all, except the intended person. It includes encryption algorithm and reliable key(s). It is clear that key design flaws account for 50 percent of security problems, and architectural risk analysis plays an important role in any solid security program. The importance of key management has been profound, since most attacks to encryption algorithm are based on vulnerabilities caused by poorly designed and developed key management. The strength of the model depends upon the key length. Keys having short lengths are not suitable for secure transmission in multinode network (MN) because they results in more hacking time. If large key lengths are used then they leads to more processing time. Therefore it is highly required to frame a model which provides the flexibility to the user to select the keys having variable lengths. The main highlight of the work is to reduce the time available to the hacker by using S-Boxes and variable key lengths. The paper includes an optimal approach for secure data processing by using SBoxes and variable key length. The simulation results are obtained by using Matlab 7.3.