Alpha-Qwerty Cipher: An Extended Vigenere Cipher

Abstract

The Vigenre Cipher is a traditional method which involves encrypting alphabetic text by using a series of different Caesar Ciphers based on the letters of a keyword. The Vigenre Cipher works on the set of 26 English alphabets. In this paper we introduce the Alpha-Qwerty Cipher and reverse Alpha-Qwerty Ciphers which are the extensions to the Vigenre Cipher. This cipher works on a set of 92 characters by introducing case sensitivity and by adding digits and some other symbols to the existing Vigenre Cipher which is of 26 characters. This paper also modifies the mapping sequence from the plain text to the cipher text.