INTERNAL REVENUE DEPARTMENT (IRD) DATA SYSTEM BY USING BLOWFISH ALGORITHM

Abstract

The document storage system has become the most popular for electronic communication in the world. Documents are used in every organization day by day and most of these documents’ data need security system. A cryptographic system (or a cipher system) is a method of protecting information and communication through code so only the user for whom the information intended can read it. A cryptographic system consists of keys, algorithms and key management facilities. In this proposed system, Blowfish Algorithm is applied to encrypt and decrypt the document. Blowfish is a variable-length key with sixteenth rounds and with each block sizes of 64 bits. It can encrypt and decrypt the document by selecting the file on symmetric keys. The system is implemented using C# programming language.