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.
