Encryption Mechanism for System-on-Chip using miniDES Algorithm with Digital Signature for Secure Communication of Embedded Real Time Applications

System-on-Chip applications have been widen to various public, private, government and social communication systems for handling security and trust as a systems for mission critical and e-government. Most mission critical and embedded real time applications run on System -on -Chip. SoCs will have limited resources, processing ability and rigid power constraints therefore, SoCs becomes a holdup when it comes to handling the complex and large footprint software [3]. saRTL is standalone Real Time Linux operating system with small footprint and having hard real time features. The bare kernel of saRTL is approximately 200KB only. Therefore using saRTL is a better option for SoC based applications. miniDES is a symmetric key encryption algorithm with very small footprint. Approximately, the size of algorithm is 3KB only and it has the power and elegance of Data Encryption Standard algorithm (DES). Since, SoCs used in critical and Real Time embedded applications, security has to be enforced in the SoCs and there is a need to provide confidentiality, integrity and authentication for SoC based applications, especially, in the area of Embedded Real Time and critical communication applications. In this paper, I explore a concept of TCP/IP packet IP level encryption mechanism using miniDES with Digital Signature for securing information, while transmitting using saRTL running on SoCs. This work aims to show that encryption mechanism of IP payload provides confidentiality, authentication and integrity of applications running on SoCs using miniDES with