Abstract

Cryptography is a current field of research at the moment as it can be crucial to offer protection to extremely delicate and confidential records from criminal wrongdoings throughout transmission over the network. The vigenere cipher is one of the standard cryptographic algorithms that prevent attackers from understanding the raw data throughout the transmission. The traditional vigenere cipher encrypts only the alphabetic plaintext with a 26×26 vigenere table because it includes only 26 English alphabets A to Z. The researcher extended the original vigenere table into 95×95 which introduces all possible characters, mathematical symbols, digits, and punctuations that are available on an ordinary QWERTY keyboard layout that can be encrypted easily by this technique and conjointly introduced case sensitivity. The objective of this modification makes the cryptanalysis procedure more difficult and increases the information security.

Highlights

  • The related terms of cryptography are described below: Cryptanalysis and Cryptanalyst: The strategy of interpreting a non-recognizable layout into its original layout without any hints how they are initially before is referred as cryptanalysis and the person who does this job is known as cryptanalyst [1]

  • The researchers have proposed an extended version of the vigenere Cipher using a 95 × 95 vigenere table which provides the facility for encrypting the lower case letters (a-z), numbers (0-9) and 33 specials characters including with space that is used in keyboard and English Language

  • The researchers on this paper are trying to further enlarge this character sets by working with more characters, so that the proposed 95 × 95 Vigenere table includes the maximum number of characters

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Summary

INTRODUCTION

With the increasing trend of digital communications and internet technologies, many of us exchange our secrets and private information in cyber space. In recent days, protecting confidential and sensitive data from undesirable individuals and maintaining privacy and security for illegal issues is a big concern. In these situations, cryptography plays an important role in providing security in cyberspace. Cryptography is a way of attaining safety where original message rearranges to a non-understandable presentation so that only the intended recipient can understand and use it [1]. Cryptography requires a key and an algorithm to transform the meaning into an undesirable presentation so that only authorized participants can realize it.

RELATED WORK
PROPOSED METHOD
Structure of the Decryption Algorithm
CONCLUSION
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