• Meeta Gohel

Information Technology field has become ubiquitous in day-to-day life to deliver user-centric communication services. With the arrival of internet and explosive growth of social networking applications and cloud computing environments, corporations do generate a substantial amount of data. There exist security risks in places where resources are connected and accessible by any person. The progress of a sustainable, unfailing and trustworthy information infrastructure depends on the secure systems. Cryptography is the elemental tool for such security systems. The study of cryptography techniques is becoming vital as the world is moving towards digitalization. The increasing connectivity of internet users attracts a lot of cyber-attacks. Cybersecurity incidents are becoming severe to take over the control of systems. One of the types of cryptographic techniques is Symmetric key encryption technique. Symmetric key encryption approach is known to apply the same single key for enciphering and deciphering process. The merits of symmetric key approach are its simplicity and faster execution. The major problem with symmetric key encryption approach is its key sharing. This vulnerability is resolved by producing the random key every time. The random key generation can be implemented through the use of secure pseudo random number generator function. Random number generator functions generate a stream of random bits, which are entirely unpredictable. Random number generation approach relies on two types – true random number generator function and pseudo random number generator function. The keystone of pseudo random number generator approach is an initial value, called seed. True random number generator is not dependent on the seed value. In this work, the security breaches of symmetric key encryption approach are studied. The attempt is to devise an encryption algorithm in order to increase the security level of symmetric key encryption approach with the use of random number generator function.

Information Security, Cryptography, Cipher, Symmetric encryption, Random number, Random number generator

"Randomized Character based Secure Plaintext Cryptography (RCSPC) Algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.280-286, April-2019, Available :http://www.jetir.org/papers/JETIR1904752.pdf

"Randomized Character based Secure Plaintext Cryptography (RCSPC) Algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp280-286, April-2019, Available at : http://www.jetir.org/papers/JETIR1904752.pdf